Premium Autoflower Seeds Bred Since 2008

Grow Diaries Shared By Auto Seeds Customers

Nothing speaks louder than real results. Explore grow diaries shared by our customers and discover how our autoflowering seeds perform from seed to harvest in real grow rooms, gardens, and greenhouses across the USA.

Why Buy Autoflower Seeds From Auto Seeds?

We’ve been breeding autoflower cannabis genetics since 2008, making us one of the world’s longest-running specialist autoflower breeders. While many seed banks sell a little bit of everything, we’ve spent nearly two decades focused on developing better autoflowers.

Every strain in our collection is bred in-house, from the first cross through to final selection. We don’t buy white-label genetics and put our name on the packet. We develop, test, and refine our own strains to meet the standards our customers expect.

Every order is backed by our germination guarantee and shipped directly from New York, with most USA customers receiving their seeds within just a few days.

What Are Autoflower Seeds?

Autoflower seeds produce cannabis plants that flower automatically as they mature, without needing changes to the light cycle. Unlike traditional photoperiod strains, which rely on longer periods of darkness to trigger flowering, autoflowers switch from vegetative growth to flowering based on age alone.

The autoflowering trait originates from Cannabis ruderalis, a hardy cannabis subspecies that evolved in regions with short summers and long daylight hours. To survive these conditions, ruderalis developed the ability to flower automatically rather than waiting for seasonal changes.

Modern autoflowers are the result of breeders combining ruderalis with normal photoperiod cannabis genetics. The goal is to retain the automatic flowering trait so what you effectively have is a version of a normal cannabis plant that grows much faster, stays short and compact and flowers without light cycle adjustments.

At Auto Seeds, we’ve worked exclusively with autoflower genetics for more than 15 years and have seen first-hand how dramatically they have evolved. Early autoflowers were often small plants with modest yields and lower THC levels. Today’s best genetics are capable of producing dense, resin-covered flowers, impressive cannabinoid content, and harvests that rival many photoperiod varieties.

Modern autoflowers are available in a wide range of profiles, from compact beginner-friendly plants to high-THC cultivars and heavy-yielding production strains. Whatever your growing style or experience level, there’s now an autoflower variety suited to almost every cultivation goal.

Autoflower Seeds vs Photoperiod Seeds: What’s The Difference?

If you’re deciding between autoflower and photoperiod cannabis seeds, this simple comparison highlights some of the key differences you should consider before choosing a strain.

Feature	Autoflower Seeds	Photoperiod Seeds
Time From Seed To Harvest	8-12 Weeks	12-20+ Weeks
Flowering Trigger	Automatic	Light Cycle Change
Typical Height	2-4 Feet	3-8+ Feet
Average Yield Per Plant	2-8 oz	4-16+ oz
Beginner Friendly	Excellent	Moderate
Light Schedule Changes Required	No	Yes

Actual yields vary depending on genetics, lighting, pot size, environment, and grower experience.

Frequently Asked Questions About Autoflower Seeds

How long do autoflower seeds take to grow?

Most autoflower strains are ready to harvest in around 8-12 weeks from seed. Some of the fastest 45 day autoflowers can finish in as little as 6 weeks from flowering.

Are autoflower seeds suitable for beginners?

Yes. In fact, we often recommend autoflowers to first-time growers. They flower automatically, don’t require light cycle changes, and generally need less day-to-day management than photoperiod plants. Because of their small size they are easier to maintain indoors and are perfect if you want to just grow a few in a little tent.

Can autoflower seeds be grown outdoors?

Absolutely. We see excellent results outdoors from autoflowers every year. Their fast growth means they can often finish before poor weather arrives, which is one of the reasons they’re so popular with outdoor growers.

Timing is still important, though. Because autoflowers begin flowering automatically after just a few weeks of growth, it’s best to start them when days are getting longer and sunlight is at its strongest. This gives plants more time to build size before they enter the flowering stage.

Thanks to their Cannabis ruderalis heritage, autoflowers also tend to cope better with cooler temperatures than many photoperiod strains. While no cannabis plant enjoys frost, autoflowers are generally more resilient to less-than-perfect outdoor conditions, making them a great option for growers in shorter or less predictable growing seasons.

What are the benefits of autoflower seeds?

The biggest benefits are speed, simplicity, and size. Autoflowers flower automatically, finish quickly, and stay compact enough for smaller growing spaces. Modern genetics can also produce impressive yields and THC levels while being easier to manage than many photoperiod strains.

Do autoflower seeds need a specific light cycle?

No. Unlike photoperiod plants, autoflowers don’t rely on changes in daylight hours to begin flowering. Indoors, most growers run either 18/6, 20/4 and even 24 hour light cycles.

What are the highest yielding autoflower seeds?

We have a selection of high yielding autoflower seeds all of which yield over 500 grams per square meter of space. Our highest yielding strains are Auto Pounder and Juicy Lucy.