Choosing which indoor cannabis seeds to opt for can be complicated. Seedsman has the largest selection of indoor cannabis seeds available online. Cannabis Seeds for Indoor Marijuana Growing. Best seeds for growing weed indoors. Check out these marijuana seeds for growing cannabis indoors. Weed seeds. What are the best cannabis seeds to cultivate indoors? Here are 5 of our favourite autoflowering and 5 of our favourite feminized strains!
Best Indoor Seeds
In legal territories, cultivating cannabis indoors is popular due to better control of the elements. Controlling the light, humidity and temperature can incur excellent results. However, choosing which indoor seeds to opt for can be complicated with the abundant indoor seeds available on the market. Most growers base their decision upon factors including but not limited to flowering time, yields per m², effects, and tastes.
Use our handy filter on the left-hand side to source the best indoor cannabis seeds for sale online, tailored precisely to your needs.
20 Great Cannabis Seeds for Indoor Marijuana Growing
Check out our handy guide on how to grow marijuana indoors and 20 great cannabis seeds for indoor marijuana growing. Growing marijuana indoors involves strong lights, fans, irrigation systems, and other cultivation equipment needed to provide marijuana plants with the right light, water, and nutrients to grow to their fullest potential.
What Is Indoor Marijuana Growing?
Indoor marijuana growing doesn’t just mean putting a marijuana plant next to the windowsill and hoping for the best. Indoor growing requires growers to mimic outdoor environmental factors such as sunlight, rain, and soil conditions. Indoor growers can equip themselves with lights strong enough to give energy to plants and the right soil conditions for optimal nutrient intake.
Indoor cultivation gives growers ultimate control over all of the elements that affect a cannabis seed’s yield, flower density, trichome production, and overall quality. Indoor growers aren’t beholden to the natural climate or season. Furthermore, cannabis crops are safeguarded against harsh environmental conditions such as wind, rain, and snow and predators.
Factors to Consider When Choosing Indoor Cannabis Seeds
When growing marijuana indoors, you’ll need to consider the most basic elements of a grow set-up starting with which cannabis seeds to buy for an indoor grow. The type of cannabis seeds you choose depends on your cultivation experience, budget, strain preference (sativa, indica, hybrid), and size of your growing space.
Here, you’ll find a list of 20 great cannabis seeds for indoor growing along with the strain’s ideal growing conditions.
Autoflowering Cannabis Seeds For Growing Indoors
Some growers may even use autoflowering seeds, which don’t require a photoperiod to flower like most marijuana seeds. Photoperiod marijuana seeds need a certain amount of light and darkness per day, usually a 12/12 cycle to transition from their vegetative to the flowering strains. For light-deprived locations, autoflowering strains will automatically flower at a set period.
1. Sensi Skunk Automatic
Sensi Skunk is a great cannabis seed for beginners and budget growers. Sensi Skunk Automatic allows beginners to take a low-maintenance approach to grow. This autoflowering seed features many of the same Skunk characteristics that have made its parent a favorite among growers and critics.
Sensi Skunk Automatic is bred from a curated ruderalis strain that enables the strain to begin to flower without a photoperiod. Sensi Skunk should autoflower after about five weeks. The seed grows short and stocky plants with big buds. Harvesting can occur about 50 days later. Experience a citrusy and sweet aroma with uplifting and stress-relieving effects.
2. Super Skunk Automatic
Super Skunk Automatic is ideal for medicinal users who want to plant as much medicine throughout the year as possible. Super Skunk Automatic provides users with strong indica effects without leaving you glued to the couch. Novice growers will appreciate how easy this strain is to grow and the relief it can bring for stress and pain.
For growers who can’t or don’t have the energy to maintain a finicky plant, the Super Skunk automatically begins to bloom after about four weeks regardless of changes in photoperiod. This automatic strain can be grown in a variety of areas such as windowsills. Super Skunk’s flowering period takes about 65 days and produces an average yield.
3. Northern Lights Automatic
Northern Lights Automatic is a great cannabis seed for growers with some experience who want to push their skills to the next level. Northern Lights Automatic is worth the effect due to its robust effects. This autoflowering strain is relatively easy to grow and produces award-winning effects and aromas.
Northern Lights Automatic grows short and just over three feet. Its flowering period is about 55 days and its seeds begin to flower after about a month or sooner. Northern Lights Automatic can produce harvests with dense and trichome-rich buds up to three times a year due to its autoflowering characteristics and flowering periods.
4. Gorilla Glue Automatic
Gorilla Glue Automatic has won multiple industry awards for its extreme trichome production that can leave trimming shears glued stuck. Gorilla Glue Automatic can reach a medium height with a dense bud structure. This autoflowering strain is easy to grow for beginners and produces a sweet and pungent aroma.
Gorilla Glue Automatic’s grow time is between 50 and 60 days and produces a plant reaching almost 40 inches. Gorilla Glue exhibits relaxing and euphoric effects, perfect for medical conditions such as pain, arthritis, stress, nausea, and epilepsy. Be careful, Gorilla Glue has a very high THC content.
5. Girl Scout Cookies Automatic
Girl Scout Cookies Automatic combines classic GSC and ruderalis genetics to produce a high-quality autoflowering strain. This indica-dominant autoflowering strain grows into medium-size plants that respond well to training. Expect trichome-rich and sweet-smelling buds that produce cerebral and physical effects.
GSC Automatic’s grow time is between 60 and 70 days from seed. Plants can reach up to 35 inches in height and produce up to seven ounces per plant. GSC Auto is easy to grow, but can produce an extremely pungent aroma. Carbon filtering can help keep your indoor grow more discreet.
6. Green Crack Automatic
Green Crack Automatic is an autoflowering marijuana strain that blends the iconic Green Crack genetics with a ruderalis. The resulting Green Crack Automatic strain grows short and stout with extremely white buds and a delightful citrus and mango aroma. Green Crack Automatic delivers users energizing effects.
Green Crack Automatic’s grow time is about 63 days from seed and can grow up to 35 inches tall. Green Crack Auto is an easy-to-grow strain that produces moderate-to-high yields indoors and outdoors. After eight to nine weeks, these autoflowering seeds can deliver the right dose of medicinal relief to lift your spirits.
Feminized Cannabis Seeds For Growing Indoors
Feminized cannabis seeds for growing indoors will only produce female cannabis plants, albeit, they require a photoperiod to begin flowering, unlike autoflowering strains. Feminized plants eliminate the possibility of growing a male plant that can pollinate your entire grow. Many feminized seeds can thrive in indoor conditions.
7. Big Bud
Big Bud is an excellent feminized cannabis seed to grow indoors due to its very high yields and dense buds. Big Bud was popularized in the 1980s and continues to be one of the hardest-working seeds out there. This indica-dominant variety has a hash-like flavor and aroma and slightly sedative effects.
Bud Bud has a flowering time between 50 and 65 days. This feminized seed can grow to an average height and have a growth spurt during bloom. Bid Bud prefers warm weather and can thrive indoors under a hydroponic setup. Its thick stalks help support its heavy bud production. Sea of Green (SOG) techniques can be used for speedy growth.
8. Silver Haze #9
Silver Haze #9 is a sativa-dominant strain from Sensi Seeds that can be grown indoors. Silver Haze is commonly available as a feminized seed. This classic and award-winning haze strain produces a cerebral high and a complex bouquet of scents including citrus, berries, mint, and other sweet fruit.
Silver Haze #9 has a flowering time of about 70 days. Silver Haze #9 can grow well under lights. It can grow tall with heavy resin production and long buds. Silver Haze #9’s strong growth allows growers to grow these plants in close proximity. Silver Haze #9 also responds well to bending and training.
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9. Amnesia Haze
Amnesia Haze takes traditional Dutch genetics and elevates them to produce a euphoric and cerebral head high like other haze varieties. Amnesia Haze thrives in indoor growing conditions, but has a relatively long flowering time. The wait is worth it. Amnesia Haze can produce a high yield under optimal cultivation conditions.
Amnesia Haze prefers consistent warm temperatures and has a ten-to-eleven-week flowering time. Growers are advised to keep indoor temperatures between 70 and 80ºF. Amnesia Haze plants must be well-ventilated to prevent mold and pest problems. This feminized seed produces a citrusy and sweet-smelling strain with powerful effects.
10. White Widow
White Widow is an excellent cannabis seed to grow indoors. With roots in the Netherlands, White Widow was developed from a pure Brazilian sativa and an indica hybrid. White Widow’s seeds are easily available and are great entry-level seeds for beginner growers. White Widow can withstand cooler climates.
White Widow produces a pine-scented cannabis strain and has a flowering time of eight to nine weeks. White Widow grows into a stocky, but high-yielding plant with resin-covered buds. Growers recommend using the SCROG technique with White Widow. White Widow can grow in soil or hydroponic setup.
11. Power Plant
Power Plant, from the Dutch Passion Seed Company, originated from South African sativa seeds. Due to its hardy genetics, Power Plant grows fast compared to most sativas and grows medium-sized flowers with popcorn buds, too. It has a woody and earthy aroma that can give you a calm and clear-headed high.
Power Plant’s flowering time is between seven and nine weeks. Power Plant seeds can grow well under SCROG methods. This plant can grow tall so consider your grow size. You can prune the plant to keep it growing nice and strong and save the trim for other cannabis infusions.
Critical is an overall excellent marijuana seed to grow indoors or outdoors. Critical seeds produce a high yield, are easy to maintain, and create a heavy coat of resin over its dense marijuana buds. Critical allows users to feel more relaxed and blissful.
Critical has a flowering time of about seven weeks. Its relatively speedy flowering time makes it a great strain for those who want to grow as fast as possible. Critical produces a plentiful crop with its tall plants, long leaves, and rich resin production.
Regular Cannabis Seeds For Growing Indoors
Regular cannabis strains can produce either a male or a female plant. There are many regular cannabis strains that can grow indoors. Below, you’ll find a list of the best cannabis seeds for indoor growing.
13. Jack Herer
Jack Herer is a great cannabis seed for indoor growing. Whether you’re a first-time or long-time grower, Jack Herer is an easy-to-grow sativa strain that delivers clear-headed euphoria and eases muscle tension. Enjoy its earthy, lemony, and peppery aroma mixed with woody and fruity flavors.
Jack Herer’s flowering time is about 65 days and can grow very tall. Jack Herer grows exceptionally in hydroponic systems. It grows bushy, so make sure there is enough space between your marijuana plants. Also, make sure you have enough height to support its growth and watch out for heavy branches that can snap.
Chemdawg has been a popular cannabis seed since the 1990s. Chemdawg is the parent strain to many of today’s best-selling strains including Headband, Sour Diesel, and OG Kush. This indica-dominant strain is easy to grow and can handle stressors well. Chemdawg produces dense buds packed with trichomes and a fruity and diesel aroma.
Chemdawg’s flowering time is about 63 days, a relatively quick grower compared to other cannabis strains. Chemdawg does well when trained in a SCROG environment to increase the yields in a small space. SCROG requires growers to prune the foliage from the base to improve airflow. Chemdawg is vulnerable to mold.
15. White Russian
White Russian seeds by Serious Seeds is an indica-dominant hybrid with AK-47 and White Widow genetics. White Russian seeds produce a high bud-to-leaf ratio with compact and trichome-heavy colas. White Russian strains deliver a long-lasting and cerebral buzz along with a deep sense of relaxation.
White Russian seeds grow into medium-height plants and produce a very pungent smell. It has a flowering time between eight and nine weeks. White Russian doesn’t require as much maintenance as other cannabis seeds and can flourish in a warm environment.
16. Maple Leaf
Maple Leaf cannabis seeds by Sensi Seeds is a legendary Aghani strain that was smuggled out of the country around the late 1970s. This pure indica is fast flowering and develops compact plants, large leaves, and dense buds that have an excess of resin. Enjoy its citrus aroma and taste, as well as its sedating effects.
Maple Leaf’s flowering time is between six and seven weeks. Maple Leaf plants resemble sativa plants with its tall-growing characteristics and dense and elongated buds. Try your hand at growing Maple Leaf in soil or hydroponic setups. SCROG methods work well with this strain, too.
17. Hindu Kush
Hindu Kush is a pure indica strain that came out of the Hindu Kush mountains in Central Asia. Since the 1980s, Hindu Kush has been a stable strain that produces medium-height plants and dense buds. Hindu Kush strains exhibit a woody smell along with notes of hash and a calming body high.
Hindu Kush has a flowering time between six and seven weeks. Hindu Kush grows short and bushy with dense flower buds. With a hydroponic set-up, Hindu Kush can produce large buds with tons of resin. Use a SOG (sea of green) technique to maximize your yields. Just make sure you keep the airflow optimal to avoid mold.
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The Best Cannabis Seeds For Indoor Cultivation
Growing cannabis indoors is convenient and effective. It allows for a degree of intervention and control that is hard to reach outdoors.
Growing cannabis indoors is a great way to maintain ultimate control over your crop. Everything can be micromanaged, from feeding to the intensity of light, to the much more advanced aspects of a grow. Here are five fabulous feminized seeds and five awesome autoflowering seeds for you to grow indoors.
THE 5 BEST AUTOFLOWERING CANNABIS SEEDS FOR INDOOR CULTIVATION
Unlike in the past, the autoflowering strains of today are much more highly regarded, and consistent to boot. For those looking to bypass complicated light cycles, or those looking for a fast turnover, autos are a perfect option for developing high-grade weed with ease. Plants can fit into the smallest of spaces, and they’re robust and resilient as they grow. Autoflowers can also be an excellent option for those just starting out on their cannabis cultivation journey. Here are five recommendations for great autoflowering strains to grow indoors!
WHITE WIDOW AUTOMATIC (ZAMNESIA SEEDS)
White Widow Automatic by Zamnesia is another cannabis classic that has rightfully earned a huge following among cannabis enthusiasts. The girl shines with an exquisite taste, good yields, and an ever so intense high. If you wonder where she got her name from, just look to her excellent resin production. Once flowering comes to a close, plants will be covered in a thick layer of sparkling trichomes. Perfect for hash and concentrates!
White Widow Automatic is an ideal specimen for the indoors. With a height that won’t exceed 110cm, you won’t have trouble finding a nice spot for it—even if space is an issue. This plant goes through its entire lifecycle in a short 10–12 weeks. Get ready to enjoy an awesome mind and body high accompanied by delicious earthy and pine flavours.
SUPER SKUNK AUTOMATIC (SENSI SEEDS)
Super Skunk Automatic by Sensi Seeds is their second sequel to a true cannabis classic, the original Skunk #1. This 80% indica boasts pretty much everything that made the original so famous, including an ultra-relaxing and potent effect, and of course the iconic “skunky” smell that deemed her an eternal classic. Sensi Seeds crossed the original Skunk #1 with an Afghani hash plant and a select autoflower—so the girl can deliver quite a punch!
There are several things that make Super Skunk a great option for indoor growing. It is very robust and forgiving, and with a short harvest time of only 7–9 weeks, you won’t need to wait long before you can blaze up its buds. The strain doesn’t get very tall, so you can easily make some space for it in small closets, tents, and the tiniest of rooms.
WATERMELON CANDY AUTOMATIC (ZAMNESIA SEEDS)
Watermelon Candy Automatic by Zamnesia Seeds is a high-quality hybrid that takes the finer points of the original and mixes it with a bit of ruderalis to create an autoflowering powerhouse that is sure to win many fans. Regardless of prior experience, she’s simply a joy to grow and is extremely easy to maintain. She takes just 9–10 weeks from seed to harvest, so she certainly doesn’t delay in delivering a sizeable return of buds.
Watermelon Candy Automatic’s high offers the best of both worlds. She begins with her sativa side, providing euphoric and uplifting moments that settle into pure indica relaxation and bliss. Combined with a moreish fruity flavour, there’s plenty to like here.
ROYAL DWARF (ROYAL QUEEN SEEDS)
Royal Dwarf by Royal Queen Seeds is an autoflowering masterpiece that can effortlessly flourish indoors and outdoors. Taking just 8–9 weeks from germination to harvest, she’s quick to grow and only reaches heights of about 80cm. This makes her extremely easy to control, but also great for growing in smaller areas. Once harvested, she provides an abundance of buds that are sure to satisfy.
Old-school Skunk fans will undoubtedly find her flavour and effects a real treat. Producing a social high followed by a relaxing full-body stone, she also has a tremendous hazy, diesel taste that is perfect for a pipe, joint, or vaporizer.
NORTHERN LIGHTS AUTOMATIC (ZAMNESIA SEEDS)
For indoor cultivars, getting to their juicy harvest in the shortest time possible is important, as this saves on energy and can make for multiple harvests per year! No such concerns with Northern Lights Automatic by Zamnesia! We gave this timeless cannabis classic our special treatment with the help of select ruderalis genetics to make it autoflowering and perfect for the indoors. Growers can now fill their bags in a super short 9 weeks from seed to harvest. As an added bonus, its height will rarely exceed 90–120cm, so the plant will fit pretty much everywhere.
Northern Lights Automatic has the same delicious taste and potency as its bigger sister. Smoke her, and she’ll deliver an amazingly relaxing body stone with an invigorating and uplifting note. It’s the perfect smoke for when you just want to chill and relax at the end of a long day!
THE 5 BEST FEMINIZED CANNABIS SEEDS FOR INDOOR CULTIVATION
If you want to decide for yourself how long to keep your indoor cannabis plants in vegetative growth, feminized (photoperiod) cannabis seeds will be for you. Growing feminized cannabis may be a tiny bit more involved, but it has the advantage of resulting in monster yields and extreme potency, and it puts your indoor cultivation skills to the test. Here are five of our very best.
BLUE DREAM (ZAMNESIA SEEDS)
Blue Dream by Zamnesia Seeds combines the best of Haze with that of the delicious Blueberry to bring us a feminized hybrid par excellence. Plant your seed, and the gorgeous specimen, with its purple and bluish buds, will grow to around 1.5m in height. This makes it still quite manageable and a great indoor strain. What’s more, and this is quite atypical for a strain with Haze genetics, she’ll rush through flowering in an incredibly short 9 weeks, so you won’t need to wait long until harvest.
Blue Dream delights with a mouth-watering mix of berry, citrus, and other sweet undertones. But be careful not to let its tempting flavours get you carried away; a euphoric and uplifting high that gradually turns into a very relaxing body stone will take you on a ride from the very beginning. Smoke too much, and you may find yourself in dreamland before you know it!
BIG BUD (SENSI SEEDS)
The original Big Bud by Sensi Seeds earned its name mainly because of its enormous production potential, but this doesn’t mean you’ll find it slacking in other areas. Far from it! The feminized version is as good a producer as the regular version, and delights with the same high potency and great scent, which harbours crisp notes and spicy undertones.
This 85% indica, a cross between Afghani and the famous Skunk, flowers in a short 50–60 days and reaches a medium height. It is not the shortest of plants, but is still easy to handle and to predict. Its great taste blends notes of spices and fruit, while its strong physical stone carries the legacy of Afghani. A top chiller smoke that’s fabulous to enjoy alone or with friends!
THC BOMB (BOMB SEEDS)
THC Bomb by Bomb Seeds is the perfect indoor strain for those who love potent smokes. Containing 20% THC on average, with some plants containing as much as 25%, THC Bomb delivers a very powerful and long-lasting high, and also won’t disappoint when it comes to flavour and growing traits.
What makes THC Bomb an excellent indoor strain is that it grows vigorously yet compact (60–90cm) and with nice branching, making it an excellent candidate for a ScrOG setup to max out yield. It flowers over a very short 7–9 weeks, resulting in an excellent yield of up to 650g/m² in good conditions. Its high starts out as a heady sativa buzz, but after a few minutes, the indica side takes hold, easing your mind and body into the deepest state of relaxation. A perfect smoke to enjoy at night!
CHOCOLOPE (DNA GENETICS)
Chocolope by DNA Genetics is an almost pure sativa (95%) that is a favourite among cannabis connoisseurs. This multi-award-winning strain is one of the most popular strains from DNA Genetics, and harkens back to a time when strains with dessert flavours reigned supreme.
Despite her sativa genetics, Chocolope is not too difficult to grow. Grown indoors, the plant may get tall, but you can easily keep it in check with some trimming. Noteworthy is her astonishingly short flowering time (for a sativa) of only 8–10 weeks. It has a delicious taste that, unlike most sativas, doesn’t have the typical spicy or citrus notes. Instead, it will make your mouth water with an incredible taste of chocolate. Its effect can only be described as electric: a nice head buzz that is energetic and motivating—perfect to start your day!
LSD (BARNEY’S FARM)
LSD by Barney’s Farm is an ultra-potent indica-dominant hybrid that grows into a sturdy, robust plant with high resistance to pests and mould. Despite its compact height of 50–100cm indoors, which makes the strain very manageable, it can reward with monstrous yields of up to 700g/m² in optimal conditions.
LSD certainly isn’t miserly when it comes to potency, considering that the strain measures a whopping 24% THC in her juicy buds. However, what makes LSD a truly unforgettable cannabis experience is the high it gives you. It puts you into a deep, trance-like stone that keeps your body grounded, while sending your mind on a trippy, almost psychedelic journey—an effect that led Barney’s Farm to give the strain its name.
THE BEST CANNABIS SEEDS FOR INDOOR CULTIVATION
These are just some of the strains you can choose if you want to grow great cannabis indoors. No matter which strain you grow—autoflowering or feminized—each has something special to offer!