Discover the best strains for indoor growing—top 20 indoor weed strains this year! Explore our comprehensive list of potent and productive indoor cannabis strains in this marijuana seeds buyers’ guide.
The best indoor strains of weed generally perform at their the best when grown indoors. These cannabis plants are easier to grow in a controlled indoor climate, but can also grow outdoors under the right conditions.
The most suitable strains for indoor growing don’t grow too tall yet produce rewarding harvests in grow tents and commercial warehouses alike. Some indoor strains are easy for beginners to grow while others take skill. You can buy indoor marijuana seeds to potentially get higher yields, better quality, or quicker turnaround out of your indoor grow.
Every indoor strain listed below is ready to buy as feminized or autoflower seeds with fast US shipping and delivery.
Best Feminized Indoor Strains
Black Sugar
Black Sugar is a potent indica strain offering excellent production and quality. These cannabis plants flower quickly and are naturally short, making them ideal for growing in small spaces. Despite their small size and quick growth, Black Sugar yields superbly indoors. Its buds are dense and covered in crystals with a wildly fruity aroma. Black Sugar weed delivers powerfully relaxing effects, beneficial for medical cannabis users. It contains over 20% THC.
| Flowering Time | 50–55 days |
|---|---|
| Brand | Seedsman |
| Pack Size | 1–100 seeds |
| Yield | 600 g/m2 |
Buy Black Sugar Seeds🌱
Gorilla Zkittlez
Gorilla Zkittlez is a cross of the West Coast strains Gorilla Glue #4 and Zkittlez that produces bumper crops of potent cannabis. This top indica hybrid is an emerging favorite of indoor growers and marijuana enthusiasts across the globe. Growing Gorilla Zkittlez feminized seeds is moderately challenging, but diligent beginners can attain excellent outcomes. Its cured buds sparkle with trichomes and emit fruity aromas. With up to 24% THC content, the high of Gorilla Zkittlez is powerful, thought-provoking, and tranquil.
| Flowering Time | 8–9 weeks |
|---|---|
| Brand | Barney’s Farm |
| Pack Size | 1/3/5/10 seeds |
| Yield | 500–700 g/m2 |
Buy Gorilla Zkittlez Seeds🌱
Blackberry Moonrocks
Blackberry Moonrocks, primarily an indica hybrid, boasts exceptional bag appeal, potency, and yield. Its vibrant, dense buds are laden with sticky trichomes. This high-THC strain showcases a distinct terpene profile with flavors similar to blackberry, blueberry, and lavender. Feminized Blackberry Moonrocks seeds thrive when cultivated indoors, quickly yielding substantial marijuana plants. With THC levels ranging from 26–33%, Blackberry Moonrocks delivers calming and sedative effects.
| Flowering Time | 8–9 weeks |
|---|---|
| Brand | Blimburn |
| Pack Size | 1–100 seeds |
| Yield | 550 g/m2 |
Buy Blackberry Moonrocks Seeds🌱
Jealousy
Jealousy, celebrated as the 2022 Leafly Strain of the Year, is an indica-dominant hybrid of Gelato 41 and Sherbert Bx1. It’s an ideal candidate for indoor growth, remaining compact yet capable of heavy yields. With THC levels ranging from 20–22%, it packs a chill body stone, enhanced by its dominant terpene Myrcene and balanced with Limonene for a touch of creative euphoria. Its outstanding aroma and flavor profile combine earthy, woody, and fruity notes for a tasty hit.
| Flowering Time | 9–10 weeks |
|---|---|
| Brand | ILGM |
| Pack Size | 5/10/20 seeds |
| Yield | 11–14 oz/plant |
Buy Jealousy Seeds🌱
Pineapple Express
Pineapple Express, new from Barneys Farm, is a sativa-dominant cross of Hawaiian landrace sativa and Trainwreck genetics. It’s a resilient, easy-to-grow strain that grows big and flowers quickly. This plant forms dense, resinous buds with THC levels exceeding 25%, exuding scents of sweet pineapple and cedar. Pineapple Express delivers a fast-acting, energetic cerebral high, evolving into a relaxed and focused state, ideal for therapeutic use. Its unique terpene profile combines tropical fruits with hints of spice and skunk.
| Flowering Time | 60–65 days |
|---|---|
| Brand | Barney’s Farm |
| Pack Size | 1/3/5/10 seeds |
| Yield | 600–700 g/m2 |
Buy Pineapple Express Seeds🌱
Grand Daddy Purple
Grand Daddy Purple, or GDP for short, is a renowned purple weed strain best known for its unreal color scheme and excellent quality. These purple-colored buds shine in trichomes and exude sweet aromas like candy. Grand Daddy Purple feminized seeds are easily manageable for indoor growers in confined spaces. The mostly indica plants grow short and bushy at only 3 feet tall indoors yet produce respectable yields. The effects of Grand Daddy Purple are heavy and narcotic, containing up to 22% THC.
| Flowering Time | 8–10 weeks |
|---|---|
| Brand | Ken’s GDP |
| Pack Size | 5 seeds |
| Yield | 450–500 g/m2 |
Buy Grand Daddy Purple Seeds🌱
White Widow
White Widow is a world-famous cannabis strain, cherished for its frosty white buds packed full of trichomes. White Widow feminized seeds are a great choice for beginner growers and easy to grow for anyone. The plants stay compact and adapt to a range of indoor growing methods including, but not limited to, SOG and SCROG techniques. White Widow produces high yields of quality buds with a signature aroma and flavor. Ranging between 16–24% THC, the effects of White Widow are potently cerebral and bring on blissful body sensations.
| Flowering Time | 8 weeks |
|---|---|
| Brand | Seedsman |
| Pack Size | 1–100 seeds |
| Yield | 450–500 g/m2 |
Buy White Widow Seeds🌱
Purple Gelato
Purple Gelato is a cross of two well-known American marijuana strains—Purple Haze and Gelato. True to its name, Purple Gelato has purple-tinged buds full of dessert-like aromas and flavors. Purple Gelato feminized seeds become bushy crops that perform best when grown indoors by the hands of a skilled cultivator. With proper TLC, Purple Gelato produces heavy yields of top-shelf weed. The effects of Purple Gelato balance between mental stimulation and physical comfort, containing up to 22% THC.
| Flowering Time | 8–10 weeks |
|---|---|
| Brand | Homegrown |
| Pack Size | 4/8/12/24 seeds |
| Yield | 18–21 oz/m2 |
Buy Purple Gelato Seeds🌱
Fruity Pebbles
Fruity Pebbles, aka Fruity Pebbles OG or FPOG, is a highly-prized US weed strain with a super fruity smell and taste similar to the sugary cereal it’s named after. Feminized Fruity Pebbles seeds grow mostly indica phenotypes that are quick to flower. The plants don’t require much space to flourish, which makes this strain perfectly suited to grow tents and other small indoor grow areas. Averaging 20% THC levels, Fruity Pebbles delivers balanced effects felt in both the mind and body.
| Flowering Time | 8–9 weeks |
|---|---|
| Brand | Blimburn |
| Pack Size | 1–100 seeds |
| Yield | 500 g/m2 |
Buy Fruity Pebbles Seeds🌱
Cali Critical Mass
Cali Critical Mass, a cross between Critical Kush and Bubba’s Gift, is a new indica/sativa hybrid from the Skunk family. It’s a fairly easy-to-grow plant that produces generous harvests of potent buds. Indoors, it grows big and fast, yielding dense, bright green colas with orange tones. The buds have a damp forest floor scent with earthy, lemony flavors. With up to 22% THC content, Cali Critical Mass weed gives off a cerebral yet physically relaxing effect.
| Flowering Time | 8–9 weeks |
|---|---|
| Brand | Seedsman |
| Pack Size | 1–100 seeds |
| Yield | 500–600 g/m2 |
Buy Cali Critical Mass Seeds🌱
Blue Gelato 41
Blue Gelato 41 is an exotic 3-way cross of Blueberry, GSC Thin Mints, and Sunset Sherbet. Many of the resulting phenotypes grow blue and purple-colored buds, while all are full of resin with sweet and earthy citrus flavors. A popular strain among indoor growers, Blue Gelato 41 feminized seeds can be grown with great results both indoors and outdoors. The finished product has an intoxicating aroma and an energetic, clear-headed high.
| Flowering Time | 9–10 weeks |
|---|---|
| Brand | Barney’s Farm |
| Pack Size | 1/3/5/10 seeds |
| Yield | 600–700 g/m2 |
Buy Blue Gelato 41 Seeds🌱
AK-47
AK-47 is a famous sativa-dominant hybrid with incredible odor and strength. This award-winning, all-time best weed strain is beloved for its pungent smell and hard-hitting effects. AK-47 feminized seeds perform at their best when grown indoors with adequate ventilation and humidity control. The plants are compact and quick-flowering with dense and sticky buds, packing up to 20% THC.
| Flowering Time | 7–9 weeks |
|---|---|
| Brand | ILGM |
| Pack Size | 5/10/20 seeds |
| Yield | 12–18 oz/plant |
Buy AK-47 Seeds🌱
Ice Cream Cake
Ice Cream Cake, a new strain on the seed market, is an alluring indica-dominant cross of Wedding Cake and Gelato 33. It offers a swift flowering time and thrives both indoors and outdoors, achieving large yields. This strain produces high yields, with THC levels around 20–25%. Distinguished for its sweet, creamy aroma with vanilla and pine undertones, Ice Cream Cake delivers a deeply relaxing and soothing high, perfect for both recreational enjoyment and therapeutic use. Its rich terpene profile enhances its appeal, blending limonene, myrcene, and caryophyllene.
| Flowering Time | 55–65 days |
|---|---|
| Brand | Barney’s Farm |
| Pack Size | 1/3/5/10 seeds |
| Yield | 600 g/m2 |
Buy Ice Cream Cake Seeds🌱
Best Autoflower Indoor Strains
Blueberry Auto
Blueberry Auto is an autoflower version of the esteemed Blueberry marijuana strain. Its buds taste and smell like real blueberries. Blueberry Auto takes only 8 to 10 weeks from starting seeds to harvest time. The plants grow fast, short, and bushy, which lends to their ease of growth indoors under LED grow lights. Blueberry Auto flowers turn blue and purple colors when temperatures drop. The effects of Blueberry Auto are comforting and sedative, bearing approx. 20% THC.
| Flowering Time | 8–10 weeks |
|---|---|
| Brand | Seedsman |
| Pack Size | 1/3/5/10 seeds |
| Yield | 450-600 g/m2 |
Buy Blueberry Auto Seeds🌱
Purple Lemonade Auto
Purple Lemonade Auto is an autoflowering marijuana strain known for its sizable purple buds and a citrusy scent reminiscent of lemonade. It’s a popular autoflower for beginner indoor cultivators. Purple Lemonade Auto feminized seeds yield fast-growing plants, typically reaching a height of around three feet when nurtured indoors with appropriate nutrients. This strain offers uplifting and soothing effects, boasting a THC content of up to 22%.
| Flowering Time | 9–10 weeks |
|---|---|
| Brand | Fast Buds |
| Pack Size | 1/3/5/10 seeds |
| Yield | 400–500 g/m2 |
Buy Purple Lemonade Auto Seeds🌱
Runtz Auto
Runtz Auto is the autoflowering iteration of the beloved Runtz, offering a swift growth cycle, completing in just 70 days from seed. This strain grows to a moderate height and promises ample yields, showcasing the same intoxicating fruity flavors as its predecessor. Its buds are drenched in cannabinoids, exuding a rich, fruity aroma. Runtz Auto is perfect for those seeking a quick turnaround without sacrificing flavor or potency. The effects are balanced, providing relaxation and a positive mood uplift, ideal for melting away stress.
| Flowering Time | 63–70 days |
|---|---|
| Brand | Barney’s Farm |
| Pack Size | 1/3/5/10 seeds |
| Yield | 400–550 g/m2 |
Buy Runtz Auto Seeds🌱
Gorilla Girl XL Auto
Gorilla Girl XL Auto is a sativa-dominant autoflower strain known for its abundant yields and rapid growth. These feminized seeds produce compact 2–4 foot tall plants, reaching maturity in only nine weeks from germination. This strain is ideal for indoor cultivation in tight spaces due to its small stature. Its buds boast sizable calyxes coated in trichomes, offering delightful fruity terpene profiles and delivering potent highs with a THC content of 18–25%.
| Flowering Time | 9 weeks |
|---|---|
| Brand | Sweet Seeds |
| Pack Size | 3/5 seeds |
| Yield | 450–550 g/m2 |
Buy Gorilla Girl XL Auto Seeds🌱
Critical Orange Punch Auto
Critical Orange Punch Auto is a well-balanced hybrid autoflower strain known for its THC-rich buds bursting with fruity scents and flavors. These speedy autoflowers yield generous quantities of dense buds. They’re exceptionally forgiving for indoor cultivation, accommodating various methods. The THC content ranges from 15–20%.
| Flowering Time | 8 weeks |
|---|---|
| Brand | Dutch Passion |
| Pack Size | 1/3/7 seeds |
| Yield | High |
Buy Critical Orange Punch Auto Seeds🌱
White Widow Auto
White Widow Auto is an autoflowering version of the legendary White Widow weed strain. White Widow Auto has frosty buds nearly white with trichomes that deliver fast-acting, hard-hitting effects, ranging from 15–20% THC content. White Widow Auto feminized seeds are a superb choice for indoor growing. The plants stay easily managed at 2–4 feet tall over their 11-week life cycle. These are cheap seeds in bulk.
| Flowering Time | 11 weeks |
|---|---|
| Brand | Seedsman |
| Pack Size | 1–100 seeds |
| Yield | Up to 125 g/plant |
Buy White Widow Auto Seeds🌱
Black Jack Auto
Black Jack Auto is an autoflowering version of the Black Jack cannabis strain—a cross between Black Domina and Jack Herer. This fast-maturing autoflower takes only nine weeks to grow from seed. Black Jack Auto plants grow short and bushy and perform at their best when cultivated indoors in a hydro setup or SCROG with soil. Its dense buds are encrusted with sticky trichomes and provide strong yet balanced effects. Up to 23% THC.
| Flowering Time | 9 weeks |
|---|---|
| Brand | Homegrown |
| Pack Size | 4/8/12/24 seeds |
| Yield | 14–19 oz/m2 |
Buy Black Jack Auto Seeds🌱
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