Autoflowering Cannabis Seeds

Buy Autoflowering Cannabis Seeds — Selection of Auto Seeds at Edabea

Autoflowering cannabis seeds incorporate genetics from Cannabis ruderalis, a subspecies native to regions with short summers in Central Asia and Eastern Europe, which developed the ability to flower by age rather than by photoperiod. The result is a complete growing cycle — germination, vegetative growth, and flowering — in 10 to 11 weeks, without needing to modify the light cycle. The autoflowering catalog at Edabea includes over 60 references from 8 specialized banks, featuring 3rd, 7th, and 8th generation varieties that have significantly closed the yield gap compared to regular photoperiod feminized seeds. If you're looking for other types, you can also check out the feminized seeds, CBD seeds, or return to the general seeds category.

What is an Autoflowering Seed and How Does it Work?

Cannabis ruderalis is a cannabis subspecies adapted to high latitudes where summers are short and unpredictable. Unlike Cannabis sativa and Cannabis indica, which flower in response to the shortening of the photoperiod, C. ruderalis begins to flower based on its age — approximately 30 days after germination — regardless of the available light hours.

Seed banks have incorporated this characteristic through successive crossings with high-yielding traits of C. sativa and C. indica, obtaining plants that retain the age-based flowering mechanism of ruderalis but with the quality profile of photoperiod varieties. Modern advanced autoflowering strains (3rd, 7th, 8th generation) have significantly reduced the original limitations of ruderalis — such as lower yield and potency — that characterized earlier generations of autoflowering seeds.

Technical Advantages of Autoflowering Seeds Over Photoperiod Seeds

Independence from Photoperiod: The main advantage is that they do not require a change of light cycle to flower. Indoors, they can be maintained under the same light cycle throughout the growth (typically 18–20 hours of light). Outdoors, they can be planted and harvested without depending on day length.

Short Total Cycle: From seed to harvest in 10–11 weeks. Some varieties complete the cycle in 70 days. This allows for multiple outdoor harvests each year in temperate climates, or quicker rotations indoors.

Compact Growth: Autoflowering plants typically grow shorter than equivalent photoperiod strains — generally between 60 and 100 cm — making them suitable for height-limited spaces or discreet outdoor cultivation.

Resilience: The inheritance of C. ruderalis brings greater tolerance to adverse environmental conditions — such as low temperatures and humidity fluctuations — compared to many photoperiod varieties.

Autoflowering vs Photoperiod — Technical Comparison

Indoor vs Outdoor Cultivation

Indoor Cultivation

Indoors, autoflowering plants can be grown under light cycles of 18–20 hours throughout the entire cycle — there's no need to switch to a 12/12 light cycle to induce flowering. An 18/6 cycle (18 hours of light, 6 of darkness) is the most common, balancing growth and energy consumption. It's recommended to use pots of at least 11–15 liters to avoid limiting root development given the plant's quick cycle — with restricted roots, above-ground growth and production drop proportionally.

Outdoor Cultivation

Outdoors, autoflowering varieties can be planted from late spring to early summer, when minimum temperatures are consistently above 10°C, and harvested before the first frosts. The independence from photoperiod also allows for a second or third harvest in the same season in temperate climates. They can be planted directly in soil or in large pots — a minimum of 15–18 liters to avoid compromising root development.

Available Banks in Edabea's Autoflowering Catalog

Legal Situation

The sale of cannabis seeds in collection format is legal in many European countries, although germination and cultivation are subject to the regulations of each jurisdiction. It is the buyer's responsibility to verify the applicable legislation in their place of residence before germinating or cultivating. The seeds are sold exclusively as collectible material.

Frequently Asked Questions About Autoflowering Seeds

Why do autoflowering strains flower without a light change?

Because they incorporate genetics from Cannabis ruderalis, a subspecies adapted to regions at high latitudes where summers are too short to depend on photoperiod as a signal for flowering. C. ruderalis developed an age-based flowering mechanism — initiating flowering approximately 30 days after germination, regardless of the available light hours. Seed banks have crossed this characteristic with high-quality genetics from C. sativa and C. indica over successive generations, producing plants that retain the automatic flowering mechanism of ruderalis with the quality profile of photoperiod varieties.

Do modern autoflowering strains yield the same as photoperiod strains?

Earlier generations of autoflowering strains had significantly lower yield and potency compared to equivalent photoperiod strains — a direct consequence of the ruderalis inheritance. Modern advanced varieties (3rd, 7th, 8th generation) have considerably reduced this gap through successive crossings and backcrossings that preserved automatic flowering but increased yield and quality. In practice, current differences are less than in previous generations, although photoperiod strains allow for greater control over final size by extending the vegetative phase.

Can the flowering of an autoflowering plant be forced by changing the light cycle?

No — the flowering mechanism of autoflowering strains is independent of the photoperiod. Changing the light cycle to 12/12 on an autoflowering strain does not hasten or delay flowering: the plant will initiate flowering at its predetermined age regardless of lighting. The only variable that the grower cannot control in an autoflowering plant is the timing of flowering — unlike photoperiod strains, where the vegetative phase can be maintained indefinitely until the grower decides to induce flowering.

How many outdoor harvests can be made per year with autoflowering strains?

It depends on the climate and latitude, but in temperate climates in southern Europe, it's common to obtain two or three harvests per season with autoflowering strains, given that the complete cycle is 10–11 weeks. A plant germinated in May can be ready by July, allowing time for a second round in summer and, in warm climates, even a third before the first frosts of autumn. In comparison, photoperiod strains produce a single harvest per year outdoors.

What pot size do autoflowering strains need?

For pot cultivation, a minimum of 11–15 liters is recommended. Since the plant's cycle is fixed — the vegetative phase cannot be extended — it's important not to limit root development from the start: with restricted roots, above-ground growth and production decrease proportionally. Unlike photoperiod strains, where transplanting to larger pots can occur during the vegetative phase, it is best to sow autoflowering varieties directly in the final pot to avoid transplant stress in such a short cycle.

Selection made by the Edabea team. Last update: April 2026. For inquiries about the availability of a specific variety, contact contacto@edabea.com.