Female Weed Seeds

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Buy Cannabis Seeds Online

Feminized cannabis seeds make growing easy! Perfect for beginners & experienced growers. ✔ Grow as female plants ✔ Best service ✔ Best range – Shop today! Feminised Cannabis Seeds is a cannabis breeder chosen specifically by Seedsman for the quality of their marijuana seeds. Buy your seeds online here. Dutch Passion: original inventors of feminised cannabis seeds and leading providers of feminised seeds with the finest genetics. Get yours today!

Feminized Cannabis Seeds

Feminized cannabis seeds are bred to contain no male chromosomes, so they’ll only grow female plants. That makes these seeds the ideal choice for growers looking for a quick and easy grow. Find your next favourite sativa or indica, THC or CBD strain today, and start growing tomorrow!

Why choose feminized seeds?

For gardeners who require a quick and easy growing and flowering process, these seeds are the ideal choice.

Description

Feminized cannabis seeds are bred to contain no male chromosomes, so they’ll only grow female plants. That makes these seeds the ideal choice for growers looking for a quick and easy grow. Find your next favourite sativa or indica, THC or CBD strain today, and start growing tomorrow!

Why choose feminized seeds?

For gardeners who require a quick and easy growing and flowering process, these seeds are the ideal choice. Some medicinal cannabis users may be deterred from cultivating their own supply because of the perceived difficulty of growing, or of identifying the different sexes and removing males early in the blooming period. If this process is too long delayed,
the males will fertilize the females, leading to a disappointing harvest of seeded bud with a lower amount of trichomes. Just one male plant is capable of fertilizing a large number of ladies. This is the last thing that most gardeners desire, especially those growing for medicinal reasons. Feminized, or ‘fem’, varieties offer a simple solution to these issues, as there is no
need to spend time during their first days in flower checking for males, nor energy removing and destroying them once they are identified.

What are feminized seeds?

People who are new to the world of indica and sativa may also have only a vague idea that there are different sexes of this
versatile plant. Seeds that occur naturally are gained from simply allowing a male to fertilize a female, and the resulting seeds will in turn produce both masculine and feminine offspring. There is no reliable way of telling which one will grow into which sex of plant, short of actually growing them. It is therefore traditional to germinate more regular seeds than one intends to grow (often twice as many) to allow for the removal of males. With feminized seeds, gardeners decide how many bushes they want, germinate that number of seeds, then simply grow, flower and reap their rewards. With the introduction of these new cannabis seeds, cultivation became easier than ever before!

How is it possible to create feminized seeds?

Every cannabis plant has the innate ability to grow the reproductive organs of the opposite sex as a survival mechanism. This ability, which is not unique to cannabis in the plant kingdom and has even been observed in some species of frogs, is one of the factors that enabled it to successfully proliferate in climates all around the world, adapting and surviving even in hostile conditions. It is not unknown for male plants to produce feminine flowers, making it possible for the plant to self-pollinate, produce seeds and ensure the survival of the species for another generation. However it is far more common for a female plant to produce male flowers for the same purpose. This fantastic survival trait is not only useful for the plant, but has now been turned to the advantage of people who wish to grow it.

Rather than being produced from male spore meeting female flower, feminized seeds are the result of forcing a female plant to produce pollen and then using this to fertilize another female. The resulting seeds lack male chromosomes, so when they are grown out, each plant will produce female flowers and growth characteristics. It is important to note that when this technique was in its infancy, a breed chosen to create male pollen usually had a genetic background that was prone to produce hermaphrodites anyway. These were easier to trigger into growing the distinctive banana-shaped male reproductive organs. Unfortunately they could also pass on their marked hermaphrodite tendencies to their offspring. Nowadays, significant advances in feminized cannabis seed breeding has solved this problem with new techniques for coaxing even the most reluctantly hermaphroditic variety into a yield of the fertile yellow dust.

Feminized seeds or female seeds?

It should be noted that seeds in this category are technically not female seeds, as the biological definition rests on them having a full complement of genetics. Some seedbanks declare that they stock ‘100% female’ seeds, but we consider this to be both scientifically inaccurate, and misleading, since they are not truly female. It is also for this reason they are seldom recommended as a good source for a mother plant. The process by which mothers have their life-cycle prolonged, and the constant low-grade stress caused by removing cuttings, is best withstood by regular females which are more resilient when kept under these conditions. Crossing naturally male cannabis plants with feminized ones should result in a yield of seed-bearing flowers, but the resulting offspring will have the same roughly 55% feminine, 45% masculine ratio as seeds created in the regular way, and there is no real advantage to doing this. However, there is little difference in aroma, flavour, resin production, THC level, THC to CBD ratio and so on, between a regular and ‘fem’ variety.

This category collects every feminized seed-strain available from the White Label Seed Company and Sensi Seeds. The filters can be used to easily view them according to the size of yield, flowering time, height gain, price, indica, sativa or hybrid content, indoor or outdoor growth suitability, whether it has won a cannabis cup, and so forth. Some of the most famous names, such as White Widow, Master Kush and different types of Skunk and Haze, can be found here.

Feminised Cannabis Seeds

Feminised cannabis seeds are an excellent addition for any seed collector, beginner, or pro.

They’re genetically bred to produce a female cannabis plant only, making them highly collectible.

We have one of the largest collections of feminised cannabis seeds online, with thousands of strains available from over 70 different seedbanks, including Dutch Passion , Barney’s Farm , Royal Queen Seeds, and our very own Seedsman Seeds.

If you’re looking to collect feminised cannabis seeds, then scroll below for the best-feminised cannabis seed selection in the world. Use the filters on the side to find the seed best suited for you.

Why Buy Feminised Cannabis Seeds?

In legal regions, feminised cannabis seeds make cultivation a bit easier as you’re getting seeds that grow into female plants – ones with flowering buds. There’s no reason for speculation. A regular seed can just as easily be a male plant, which is used only for breeding but not for cultivating. So, if you’re a hobby grower feminised seeds are best for you!

How Do Feminised Cannabis Seeds Work?

Cannabis that grows in the wild is usually hermaphrodite plants. This means they contain the physical traits of male and female. This genetic profile comes as a result of needing to self-populate. Most commercialised plants have hermaphrodite genes bred out of them in a time-saving measure. Quality feminised seeds are incredibly resistant to developing this gene, especially when cultivated in the correct conditions. Feminised seeds are created by a grower breeding two female plants together, ensuring their offspring will be female. This is achieved by spraying the juvenile flowers with gibberellic acid or colloidal silver to alter their development.

The pollen sacs are harvested, and the ‘female’ pollen used to harvest buds of another female plant. This results in the seeds developing with just female genes. As male plants can fertilise multiple females, the popularity of feminised seeds continues to significantly aid the future preservation of cannabis strains for generations to come.

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Feminised seeds are great for a beginner grower as, if raised properly, they will produce buds no matter what. There’s no guesswork involved.

Reasons to Grow from Feminised Seeds

There are actually many advantages to be had for growers who start their harvest with feminised seeds. Think about it: since you’re removing all the guesswork associated with germinating regular seeds, you are actually saving up quite a bit of time, space and particularly, energy. As a matter of fact, feminised seeds can significantly streamline the growing process.

This improvement in efficiency is not just important to medical cannabis users but also cannabis hobbyists. Majority of cannabis regulations have placed a limit on plant counts – therefore, growers who are cultivating a small harvest for personal use need to absolutely ensure that they’re getting the most ‘bang for the buck’ as far as the grow goes.

Male plants actually do a lot more than simply take up space in your garden. They demand a lot of time and resources for one. And, in gardens where both male and female plants are present, growers are tasked with the cumbersome process of cultivating both plants until their sexes are apparent.

Even though some strains can show early signs of their gender before flowering actually begins, majority of cannabis plants will not express their gender until they start to mature, which comes after the vegetative stage, it might be noted.

The change occurs when the amount of light and dark the plant must receive, changes to a 12-hour light/12-hour dark cycle. In outdoor gardens, this change happens naturally as the seasons change. In a controlled indoor garden, this change must be exerted through timed grow lights.

Once the plants are mature enough, growers must go through the painstaking task of determining their sex and monitoring each and every single plant to ensure that Males are removed before they have a chance to pollinate the females (which can prove disastrous).

By using feminised seeds only, growers no longer have to spend weeks nurturing their plants where there is only a 50% chance of those plants expressing themselves as females. In addition, they can also maximise the space and plant count within their grow space.

Which Feminised Cannabis Seeds Should I Buy?

If you’re looking for something high in THC, check out: Fuel D.OG, Purple Ghost Candy or Blue Dream

The Best Feminised Cannabis Seeds for Beginners

Gelat.OG

Gelat.OG is the culmination of bringing together two much-in-demand West Coast strains, viz. Gelato and OG Kush. If you are looking for a strain with a deliciously mouth-watering taste, heavy yields, pretty fast flowering and a happy yet potent and relaxing effect – and let’s face it, who isn’t? – then you may well have found your Holy Grail in Gelat.OG.

Gelat.OG grows well both indoors and outdoors. Cultivated indoors, it will grow to a height of between 90 – 120 cm. tall. Producing 500 – 600 gr/m2 in just 55 – 60 days of flowering. Outdoors it is recommended to plant out in at least 50-litre pots or, preferably, directly in the ground. Where it will grow to a height of 220 cm. Harvest time will be in the last days of September, giving it a wide range of cultivability even in higher latitudes where the inclement weather of autumn is yet to make an appearance, with yields of 400 – 600 gr/plant.

White Widow

White Widow is one of the best-known and still one of the most potent cannabis strains in the world. Originally created in the early 1990s, its release to the coffee shops of Amsterdam was soon met with universal rave reviews. Canna-tourists flocked in their thousands to find out whether all the advance publicity for this white strain was true. It was and remains so today. Bred by crossing a Brazilian sativa strain with a highly resinous South Indian indica, it is named after the plant’s frosty appearance. This makes it white with resin.

Badazz Cookies OG

Badazz Cookies OG is a three-way hybrid comprised of BadAzz, OG Kush and Cookies Kush. Genetically, it is 70% indica and produces high levels of resin and terpenes, making it a great strain from which to make cannabis extracts and concentrates. This is a superb-tasting strain that will have smokers coming back for more and more.

Outdoors these plants can reach a height of up to 300 cm. when planted directly in the ground which gives the roots plenty of room to develop. The yield will be between 600 – 800 gr/plant with harvest in the first half of October in northern latitudes in this environment. Outdoor cultivation should only be attempted in regions where the weather will not cause high humidity and damp levels; otherwise, there is a strong likelihood of the crop being ruined.

Feminised Seeds

Most home cannabis growers looking to buy feminised seeds turn to Dutch Passion. As the first seed bank to create feminised cannabis seeds back in the early 1990’s, we take pride in supplying the best quality feminised seeds to the home recreational and medical growers. Female seeds (or feminized seeds) grow into female cannabis plants, saving you the hassle of unwanted male plants.

Active filters

Sugar Bomb Punch®

THC Bomb X (Critical Orange Punch x Bubba Island Kush)

Amsterdam Amnesia®

Amsterdam Amnesia

Mazar®

Skunk#1 X Afghani

Skywalker Haze®

Original Skywalker x Amsterdam Amnesia

Kerosene Krash®

Gorilla Glue #4 X Sherbet

Meringue®

Wedding Cake X Animal Cookies

Mokum’s Tulip®

Gelato X Sherbet

Critical Orange Punch®

Critical X (Grandaddy Purps X Orange Bud)

Power Plant®

Original South African Power Plant

HiFi 4G®

WiFi OG X Glueberry OG

Trial Pack Feminised

Trial Pack Feminised

Orange Bud®

Original Orange Bud

Passion Fruit®

Sweet Pink Grapefruit X Orange Bud

Strawberry Cough®

Original Strawberry Cough

Blueberry®

1970’s Original Blueberry

Frisian Dew®

Super Skunk X Purple Star

Durban Poison®

Durban X Unknown Indica

Passion #1®

Californian Indica

First Feminised Seeds Company Since The 1990’s

Dutch Passion were the first company in the world to create feminised cannabis seeds back in the 1990’s. Feminised seeds changed the way people grew cannabis as the grower can use a smaller grow room with fewer seeds for each grow. Each feminised seed will eventually grow into a mature female plant. Feminised seeds account for the vast majority of cannabis seeds used, these days over 95% of all cannabis seeds are feminised.

The process to create feminised seeds was discovered in the 1990’s when Dutch Passion allowed some female cannabis plants to bloom for many weeks longer than normal, just to see what happened. The plants eventually produced male flowers, the pollen was collected from these. To everyone’s great surprise this (‘female’) pollen produced seeds which only gave rise to female plants. Today, different techniques are used to produce and collect this ‘female pollen’. Feminised cannabis seeds have made growing your own cannabis easier than ever before.

Since the invention of feminised seeds, we have continued to improve feminised seed performance and results. Dutch Passion’s main focus is to provide the best performing cannabis seeds to professional growers and home growers. We source the finest cannabis genetics from our unrivalled network of breeders and genetic specialists around the world. When you buy your next feminised seeds buy them from Dutch Passion, the original creators and masters of feminised seeds.

Sugar Bomb Punch. Euphoric couch-lock stone and flowers covered with dense, glistening trichomes.

What Are Feminized Cannabis Seeds ?

Around 95% of feminised cannabis seeds grow into mature photoperiod female cannabis plants. Before feminised seeds were invented people grew from regular cannabis seeds which produced roughly equal numbers of male and female plants. Growers are usually only interested in the buds which grow on the female plants, male cannabis plants are normally discarded.

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When Dutch Passion first created feminised seeds back in the 1990’s it was a revolution for growers who could grow their weed easily with fewer seeds, fewer plants, smaller grow rooms and less energy. Feminised seeds have remained popular with the majority of growers ever since.

Feminized vs Autoflowering Seeds

Feminised seeds have 2 main phases to their lives, veg and bloom, these can be controlled by the grower. During the first ‘veg’ stage of their life, feminised seeds grow vegetatively. During ‘veg’ growth (usually under 18-24 hours of daily light) plants grow leaves, roots and branches but no buds. Buds start to appear when daily light hours are reduced to 12/12 light which induces bloom (flowering). This requires around 12 hours of darkness and 12 hours of light per day.

Autoflower seeds grow from seed to harvest under 20 hours of daily light indoors. No change to the amount of daily light is needed for the autoflower plant to start flowering, it happens automatically (hence the name, auto seeds). Some growers regard autoflower seeds as a slightly simpler/faster way to grow cannabis. You can achieve very high quality cannabis levels from either feminised seeds or autoflowering seeds. Note that autoflowering seeds from Dutch Passion will only produce female auto plants, meaning that you never need to worry about male auto plants.

And Autofem Seeds Were Born

Autofem seeds are simply another name for autoflowering seeds. In the early days of autoflower seeds they were occasionally called autofems by some growers. The ‘fem’ part of the name refers to the fact that the seeds only produce female autos. Autoflower seeds/autofem seeds are one of the easiest ways to grow your own cannabis quickly. You don’t need to be an expert grower to get seriously impressive results from autofem/autoflower seeds.

Feminized vs Regular Seeds

Regular cannabis seeds produce roughly equal numbers of female and male plants. Some old-school traditional growers prefer regular photoperiod seeds if they are e.g. collecting male pollen for breeding projects. But most people strongly prefer to grow from feminised seeds which give rise to mainly female plants.

When using feminised seeds the grower can use a smaller grow room with fewer plants, compared to regular seeds. Dutch Passion are one of the few remaining seed companies to offer a full collection of regular seeds from the best classic varieties.

Kerosene Krash from feminized seeds. Amazing trichome production with a high THC content.

Buy Feminised Seeds From The UK and Worldwide

Your next cannabis grow is too important to disappoint because of low quality seeds. If you want to grow the finest cannabis genetics which will give you harvests of top quality cannabis then choose Dutch Passion. As the original inventors of feminised seeds, with over 30 years of breeding success you can trust Dutch Passion seeds for your next grow. With over 50 cannabis cups and thousands of repeat growers you are in safe hands.

Dutch Passion’s collection of cannabis cup winning strains can be shipped to the EU, UK and elsewhere. Buy the best cannabis seeds online from the original inventor of feminised seeds. Our feminised seeds are shipped in discrete packaging and can be delivered in 24 hours. In the unlikely event of any issues you have our award winning service and support team waiting to help and support.

Top 5 Indoor Feminized Seeds

If you are an indoor grower looking for the finest quality indoor feminised seeds then choose a seed supplier that shares your passion for the highest standards. With decades of breeding experience we have a collection of the best cannabis cup winning strains which will grow easily across all grow conditions with heavy yields, superb taste and rich, connoisseur flavours. Our blogs on the Top-5 Indica seeds and our Top-5 Sativa seeds are must-reads for any serious growers looking for the very best feminised indoor seeds.

Yield THC Family
Kerosene Krash® XXL ○○○○○
Sugar Bomb Punch® XXL ○○○○○
Blueberry® M ○○○○○
Orange Bud XL ○○○○○
Mokum’s Tulip® XXL ○○○○○
THC: ■ Low ■ Medium ■ High ■ Very High ■ Extremely High

Top 5 Outdoor Feminized Seeds

Growing cannabis outdoors is the cheapest way to produce your own medical/recreational weed. You need a sheltered, private and sunny grow location with good quality moist soil. You also need fully proven outdoor feminised cannabis seeds. Dutch Passion has one of the most respected outdoor weed seed collections available. These seeds will grow outdoors in Dutch/UK climates (or similar) with strong pest and weather/mold resistance.

Yield THC Family
Frisian Dew® XXL ○○○○○
Passion #1® XL ○○○○○
Durban Poison® XXL ○○○○○
Frisian Duck® XXL ○○○○○
Hollands Hope® L ○○○○○
THC: ■ Low ■ Medium ■ High ■ Very High ■ Extremely High

Top 5 THC-Rich Feminized Seeds

For many modern growers achieving a satisfying harvest means growing fully proven, consistently THC rich cannabis strains. THC rich cannabis strains deliver a strong psycho active effect which dissolve stress and anxiety leaving the user mentally relaxed and physically refreshed. THC rich feminised seeds remain one of Dutch Passion’s greatest strengths.

Yield THC Family
Glueberry OG XL ○○○○○
Auto Cinderella Jack® XL ○○○○○
Passion Fruit® XXL ○○○○○
HiFi 4G® XL ○○○○○
Meringue® XL ○○○○○
THC: ■ Low ■ Medium ■ High ■ Very High ■ Extremely High

Top 5 Medical Feminized Seeds

Some medical growers find that THC rich cannabis strains are the most helpful. Others find that CBD rich strains offer better physical effects with a slightly milder (less intense) high. Much depends on your own personal preferences. Dutch Passion offer a range of THC rich strains, CBD rich strains and strains with balanced levels of THC:CBD. It’s important to state that each medical user will have their own preferences for indica or sativa, THC or CBD. This means the medical grower will need to research the strains most likely to help them.

Yield THC Family
THC-Victory® L ○○○○○
CBD Charlotte’s Angel® XL ○○○○○
CBD Skunk Haze® XL ○○○○○
Mazar® XL ○○○○○
Desfrán® XXL ○○○○○
THC: ■ Low ■ Medium ■ High ■ Very High ■ Extremely High

Top 10 Tips For Growing Feminised Seeds

Growing your own cannabis is really easy. With the best feminised seeds you will grow better quality cannabis than you can buy. Home grown cannabis is easy and enjoyable to grow and cheaper than buying it. Here are our top 10 tips for growers.

1. Choose your feminised cannabis seeds and your supplier carefully!

Even the very best growers can’t produce top quality buds from second rate genetics. You need to use the best quality feminised seeds, grown from the finest quality genetics. Dutch Passion were the original inventors of feminised seeds. Since inventing feminised seeds, the Dutch Passion team have constantly strived to further improve the results achievable from them.

Don’t cut corners when it comes to the choice of your cannabis seeds. The cost of the cannabis seeds is a very small part of the final overall harvest value. It pays you to research your options carefully. Does your seed supplier have a good track record in feminised seeds? Have they been able to gain any professional recognition with cannabis cups? Has your seed supplier stood the test of time and remained at the top of their profession for decades?

2. Try not to over-complicate your grow

Gain experience slowly, don’t be tempted to try complicated grow techniques (such as deep water culture hydroponics) until you have completed several successful grows. Often, people will start growing in large containers of soil. This minimises the need to quickly become an expert in nutrients, and allows an easy way to understand the basics. Cannabis isn’t difficult to grow, it’s called weed for good reasons! The new grower is encouraged to learn the fundamentals of cannabis growing before attempting to learn more technically demanding skills and techniques. Organic growing in soil is recommended and Biotabs is good nutrient line for beginners to start with.

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3. Continual improvement of your grow room

Try to learn something from each grow, improve your skills and grow experience, learn what you can from the internet and books. Avoid temperature extremes, indoor plants don’t like temperatures above 30ºC, nor do they like being much below 20ºC. Indoor growers typically like to keep the temperature around a steady 24-25ºC with the lights on, and a couple of degrees cooler at lights out.

Many growers prepare their water the day before it’s required. This allows the temperature of the water to match that of the grow room. Never use ice cold water, it will shock the roots. Some growers feel that allowing the nutrient mix to stand for a day before use allows any Chlorine (often used during water treatment) to be released from the water.

Experienced cultivators insist on using pH meters to ensure their water and feed solutions are at the correct pH. Likewise, they will often use EC meters to monitor the electrical conductivity of their feed solutions. EC, or electrical conductivity, is a measure of nutrient concentration. Meters should always be calibrated and checked before use. Professional growers will always have spare meters available in case one fails.

4. Growing feminised seeds outdoors is easy too

Growing feminised seeds outdoors is even easier than growing indoors. In the northern hemisphere, feminised seeds are often harvested around October. Often the grower will germinate the feminised seeds indoors. (see the Dutch Passion guide on best ways to germinate cannabis seeds). This gives the seeds the best possible start, and protects the seedlings from the worst of the early season weather while they are at their most vulnerable. After a couple of weeks of indoor cultivation, the seedlings can then be planted outdoors when the weather is warm and the last frost has gone.

5. Experiment with different periods of vegetative growth

It’s common to use around 4-5 weeks of vegetative growth (before bloom) when growing feminised seeds indoors. But some growers get great results with longer veg periods of 6-10 weeks. The extra time spent in veg allows for a larger final plant size. This is great if you prefer to have smaller numbers of XL yielding plants and have the space to accommodate them.

For some growers who don’t mind large plant numbers, it’s possible to grow feminised seeds with just 1-2 weeks of vegetative growth (or even none at all!). The result will be a fast ‘Sea Of Green’ harvest of medium size plants which may often have the bulk of their buds on the main bloom.

For outdoor growing it is recommended to pre-grow (18 hours of light per day) the plants indoor for at least a few weeks. Between 3-4 weeks will usually do, use even longer VEG periods if you are looking for the biggest outdoor plants as possible. It will ensure a stronger and healthier plant that will cope better with tough outdoor growing conditions than a young, freshly sprouted, seedling.

6. Avoid the temptation to over feed your cannabis plants

One of the most common mistakes, especially from less experienced growers, is the temptation to over feed their plants. Over-feeding plants can permanently damage and ‘burn’ the roots of cannabis plants, especially young plants. It is crucial to start feeding nutrients at low concentrations and steadily increase. At the first sign of nutrient burn (perhaps you will note the ends of the leaves turning white/yellow and eventually brown and crispy) you should reduce nutrient concentration immediately and consider a water flush for several days in a row.

Overfeeding your plants will not increase size or potency, but it can permanently stunt the growth of your plants. Understand your nutrients well and never add more nutrients than necessary. Less experienced growers may benefit from a simpler nutrient regime, avoiding an over-complicated array of nutrients until they are more experienced.

7. Avoid the temptation to over water your cannabis plants

Along with using excessively high nutrient concentrations, another of the most common errors is the tendency to over water their cannabis plants. This is also a frequent error seen among new growers. Cannabis roots need oxygen to thrive and grow well, roots do not grow well in water logged soil. Using excessively ‘wet’ soil will limit root growth, this will restrict the final size and quality of the plant.

Experienced growers will often use a moisture sensor in their grow medium which measures moisture content and indicates when the roots are too dry. Products like the Blumat Moisture meter are recommended to prevent over watering. Note that numerous growers find new grow containers such as fabric grow containers or Air-pots are a great way to improve levels of root oxygenation.

Compared to traditional grow containers, felt grow sacks and air-pots allow good levels of root aeration and are recommended. Another tip is to mix some coco medium through your soil, this will improve the aeration levels too.

8. Find out when you prefer to harvest your buds

Feminised seeds offer the perfect amount of grower control over the final result. You can opt for long or short veg periods and have some control over the final plant size and yield. Connoisseur growers also know whether they prefer their buds harvested on time, or perhaps a little early/late. Some growers find that giving the buds an extra week or two in bloom can give a heavier, ‘stonier’ feel to the high.

Conversely, harvesting a little earlier may allow a faster harvest and perhaps a slightly more ‘lively’ or energetic quality to the high. Much depends on your personal preference. But the next time you harvest a plant grown from feminised seeds, consider harvesting a portion of the buds earlier than usual as well as harvesting some buds later than usual. After curing, try comparing the buds and see if you have a strong preference.

9. Consider upgrading to LED lighting

As your experience improves, consider LED lighting. LED is more expensive than HPS, but it is used extensively by serious growers. HPS lights were never designed for cannabis cultivation, they were simply a cheap option which worked. LED lights have a spectrum optimised for cannabis growing and they emit less heat than HPS. LED growers find they use less electricity and have less heat issues compared to HPS growers. But the main benefit of LED is the scope for quality/potency improvements. Most growers find they can push potency and flavour to new levels by upgrading to LED, and would therefore never switch back to HPS.

10. UV supplemental lighting

Some growers are starting to use supplemental UV lighting to boost the potency of their harvests. The idea is to mimic the effects of the UV content in the sun’s rays. Professional cannabis growers have found that adding UVB to their grow room can improve cannabinoid content. THC levels can increase by 10-25% relatively.

Historically, the cheapest way to add UVB to the grow room is to add a few ‘reptile tubes’. These are fluorescent tubes with a high UVB output designed for indoor lizard owners. Usually, cannabis growers add UVB for 2-3 hours per day for the last 2-3 weeks of bloom. But some UVB specialists claim that a small background presence of UVB can be used from the start of the grow.

Other types of UV lighting, like UV-A, are being explored as well. First reports showed UV-A could have significant effects on terpenes and the aroma of cannabis, as well as having a small effect on photosynthesis. UVC is used for sterilisation, to kill bacteria or get rid of pathogens, but is very damaging to all living things in a high dosage.

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