The Best Autoflowering Strains for Indoors

If you live in an area where you can’t grow cannabis outdoors because of climate or lack of space, the great news is that there are plenty of autos for cultivating indoors. 

Every autoflower is suited for indoor growing, and autoflowering strains are a top choice for beginners and advanced growers. Not only do autoflowering strains , give excellent yields ranging from 50-120g/plant, but indoor autoflowering strains grow best in 24/0, 20/4, 18/6, and 12/12 light schedules.

In this article, you’ll learn the best autoflowering strain varieties to grow indoors from our autoflower seeds collection and how to cultivate your own.

Granddaddy Purple

This strain is grown best in a humidity-controlled environment and thrives when the humidity is around 50%. Granddaddy Purple (GDP) has plenty more pros for indoor Cannabis cultivators. Firstly, the plant is compact for stealthy grows and flowers within an average of 8-11 weeks.

Granddaddy Purple autoflower seeds

Need to relax after a long day? Why not sink into your couch and kiss the worries of the day goodbye? Auto Granddaddy Purple (Auto GDP) is the strain for doing just that.

Buy seeds

Granddaddy Purple is a 100% indica strain, so you can expect a relaxed and chilled-out high to tackle stress and wind down. It’s also important to note that GDP can contain up to 23% when grown in the right conditions. 

Read our full strain report for Granddaddy Purple, or find the prices for Granddaddy Purple autoflower seeds in the store.

Granddaddy Purple cultivar profile

White Widow 

The White Widow strain has been a go-to cerebral high since the 90s because of its balanced effects. The strain is a 60% indica hybrid with a euphoric and happy high. With this strain, you can expect THC levels up to 19% and no couchlock.

White Widow autoflower seeds

White Widow autoflower seeds make it even easier for you to grow this classic Cannabis strain at home! It delivers those chill happy vibes that many people associate with marijuana.

Buy seeds

White Widow flowers in 7-10 weeks, making it one of the fastest indoor autoflowers. As one of the best autoflowering weed seeds to grow indoors, White Widow is easy to manage and has compact size plants. 

Read our full strain report for White Widow, or get 20 seeds for the price of 10 with White Widow autoflower seeds.

White Widow cultivar profile

Blue Dream

This strain is a mostly sativa hybrid with THC levels of up to 21%, giving you an easy-going high that’s perfect for everyday use. Blue Dream derives from the Blueberry and Super Silver Haze strains, giving it the taste and smell of berries.

Blue Dream autoflower seeds

The Blue Dream Autoflower is a cross between the hardy ruderalis and the sativa-dominant hybrid, Blue Dream. Its Blue dream parent is 80% sativa but known for its relaxing vibes.

Buy seeds

When growing your own Blue Dream autoflowering seeds, you’ll start to see signs of flowering at around the 5-week mark and have fully flowered plants within 7-10 weeks. Like all autoflower strains, you can grow Blue Dream indoors (and it’s pretty easy to grow) with average yields between 5-15 oz.

Easiest Autoflowers Strains to Grow - ILGM

Here’s some information on the easiest autoflower strains to grow, the best strain to start with, and why you should grow autoflower strains!

ILGM BlogRobert Bergman

Read our full strain report for Blue Dream, or find the prices for Blue Dream autoflower seeds.

Blue Dream cultivar profile

Bruce Banner

Just like his green-skinned alter-ego, 'The Incredible Hulk', Bruce Banner is known as one of the most potent strains on the planet today. This 60% sativa hybrid contains THC levels between 24-29%, putting it in the top 10 strongest strains in the world.

Bruce Banner autoflower seeds

The Bruce Banner strain is one of our signature strains, a perfect blend of OG Kush and Strawberry Diesel that is based on the original prize-winning Bruce Banner.

Buy seeds

Bruce Banner plants can grow taller than other autos for cultivating indoors, but don’t let that put you off. As long as you have sufficient space, you can expect to yield around 21oz of glorious bud during harvest. The average indoor flowering stage is around 7-10 for most indoor autoflower strains. Bruce Banner takes a little longer at 9-10 weeks, but the end result is well worth the wait. 

Read our full strain report for Bruce Banner, or find the prices for Bruce Banner autoflower seeds.

Bruce Banner cultivar profile

Girl Scout Cookies

Cultivating your own Girl Scout Cookies autoflower seeds indoors has never been easy, as the seeds produce short to medium-height plants and are very resistant to mildew and pests.

Girl Scout Cookies autoflower seeds

Girl Scout Cookies autoflower seeds are a hybrid of Durban Poison and OG Kush mixed with ruderalis traits to make it autoflowering. Its lovely aroma of sweet earthiness provides a delightful, euphoric high that leaves you completely relaxed.

Buy seeds

The best medium for indoor autoflowers is hydro or nutrient-dense and acid-balanced soil like Super Soil. For best results, it’s important to grow your GSC in Super Soil, but as Super Soil is a concentrate, you don’t want to apply it to your seeds directly as it may cause nutrient burn. With optimal growing settings, you can expect to yield about 10 oz per square meter. 

Read our full strain report for Girl Scout Cookies, or find the prices for Girl Scout Cookies autoflower seeds.

Girl Scout Cookies cultivar profile

Zkittlez

This 70% indica strain is fruity with a noticeable citrus smell and an uplifting and relaxing high. Zkittlez autoflower can reach levels of 23% percent THC when cultivated correctly, and the little compact plants are fully flowered in 7-8 weeks.

Zkittlez autoflower seeds

Zkittlez comes from a delicious combination of Grape Ape and Grapefruit strains. The genetics lead to an indica-dominant strain with an impressively fruity flavor.

Buy seeds

Zkittlez is one of the best auto strains for indoor growers because it’s very easy to grow and thrives in an environment with heat and humidity. You should get around 5-15 ounces per square yard when your Zkittlez plants are ready for harvest.

Read our full strain report for Zkittlez, or find the prices for Zkittlez autoflower seedsauto flowering.

Zkittlez cultivar profile

Do-Si-Dos

If you want a mostly indica strain with super high levels of THC (30%), then Do-Si-Dos might just be the best autoflower to grow indoors. The Do-Si-Dos strain consists of ruderalis genetics, making it perfect for cultivators to grow indoors.

Do-Si-Dos autoflower seeds

This autoflowering indica-dominant strain (70:30% ratio) delivers THC levels up to 30% and is easier to grow than photoperiod seeds.

Buy seeds

Do-Si-Dos plants prefer a warm and humid climate between 70-80℉, which is between 21-26℃. Compared to regular Do-Si-Dos seeds, the autoflowering version grows to a smaller height, making it more manageable and ideal for indoor growth.

Read our full strain report for Do-Si-Dos, or find the prices for Do-Si-Dos autoflower seeds.

Do-Si-Dos cultivar profile

GG4 (also known as Gorilla Glue)

This strain has been a favorite of Cannabis consumers for a long time, has won multiple awards, and has helped to shape the Cannabis landscape for future strains.

GG4 autoflower seeds

With GG4 aka Gorilla Glue aka Original Glue autoflower seeds, your harvest is ready extremely fast. Autoflower seeds produce compact plants, making this the perfect strain to grow in smaller grow sites.

Buy seeds

Growing autos indoors guarantees that the plants will flower, even with little maintenance. Autoflower seeds produce smaller plants than usual so that they can be grown indoors under the right conditions and even in smaller spaces. Gorilla Glue is one of those plants that not only produce high levels of THC at 26% but this hybrid strain is ideal for beginner and expert growers.

Read our full strain report for GG4, or find the prices for GG4 autoflower seeds.

GG4 cultivar profile

Runtz

There’s no shortage of 50/50 hybrid strains, but some stand out more than others and Runtz autoflowering is as potent as it is easy to grow. Runtz plants are compact, making them great for smaller spaces and can reach THC levels up to 29%.

Runtz autoflower seeds

Runtz strain of Cannabis first appeared in 2017 at the Santa Rosa Emerald Cup. Since then, it has won multiple awards, including the 2020 People's choice award for best indica flower.

Buy seeds

The average yield of an autoflowering weed strain is between 5 to 15 ounces per plant. With Runtz, you can expect a good yield in less-than-ideal conditions, and when grown indoors, Runtz will flower on schedule within 7-10 weeks. 

Read our full strain report for Runtz, or find the prices for Runtz autoflower seeds.

Runtz cultivar profile

Gold Leaf

The signature autoflower strain of Robert Bergman is a 60% indica that pumps up the good vibes and offers high levels of THC at 21%. Gold Leaf produces sticky buds when grown indoors and a distinct and pungent aroma that leaves a sweet taste in the mouth.

Gold Leaf autoflower seeds

Robert's own Gold Leaf autoflower seeds grow a herb that puts you in a relaxed, euphoric mood. Even with high THC levels, it delivers a smooth smoke.

Buy seeds

Gold Leaf can be grown indoors like all autoflower seeds, but to reach its full potential, it should be provided with enough light and care. Autoflower is ready to harvest at a quicker rate than regular seeds, and you can expect yields of 5-15 ounces per plant. 

Read our full strain report for Gold Leaf, or find the prices for Gold Leaf autoflower seeds.

Gold Leaf cultivar profile

Autoflower Super Mix

Whether you’re a beginner or an advanced grower, you may want to try out different seeds to see what suits you the most. Find top seeds like Gorilla Glue and Bruce Banner all in one pack; check out the Autoflower Super Mix.

Autoflower Super Mix seed variety pack

There's good. There's great. And then, there's super. The strains in this mix pack have earned that title, not just from us, but also from our customers.

Buy Mix Pack

Conclusion

Growing your own Cannabis can be fun and exciting when you watch your plants go from seeds to flowers to harvest. For the best results, download the Plant Care Guide to learn how to best treat your plants.

Happy growing!