1. Short life cycle

Autoflowering seeds have a fast life cycle, completing their development from germination to harvest in just 8 to 12 weeks.

This allows for multiple harvests per year, even in temperate climates, and is ideal for those looking for quick results without waiting for long flowering periods as is the case with photoperiod plants.

2. They do not depend on the photoperiod

Unlike photoperiod varieties, autoflowering varieties do not require a change in light/dark hours to begin flowering.

They bloom automatically after 2-4 weeks of vegetative growth, which makes it easy to grow at any time of year, both indoors and outdoors.

3. Easy to grow

Their genetic resistance, derived from ruderalis, gives them greater tolerance to common errors, such as overwatering, nutritional imbalances, or environmental fluctuations.

This makes them perfect for beginners, as they require less intervention and supervision.

4. Discretion and compact size

Most autoflowering varieties have a compact structure, with a height that usually varies between 40 and 100 cm.

This allows them to be grown on balconies, terraces, small spaces, or greenhouses without attracting attention, something essential for many urban growers.

5. Ideal for outdoor crops

Thanks to their rapid growth and independence from photoperiod, they can be grown in regions with short summers or unstable climates, allowing them to harvest before bad weather arrives.

In addition, their tolerance to cold and light stress allows them develop in adverse conditions better than other genetics.

6. Fast and consistent production

Although its production may be more modest than photoperiodic ones, the possibility of making several harvests a year more than makes up for this difference.

Many growers choose to stagger plantings every few weeks, creating a steady stream of flowers ready to harvest.

7. Perfect "guerrilla" crops

Due to their small size, rapid development, and low maintenance, they are ideal for discreet outdoor cultivation in remote or inaccessible areas, known as guerrilla farming.

In addition, its rapid cycle reduces the time plants are exposed to potential theft or adverse weather conditions.

8. Fewer pests and diseases

By spending less time in the ground, autoflowering plants reduce prolonged exposure to pests or diseases typical of prolonged cultivation.

This means fewer treatments, less stress for the plant, and a cleaner harvest.

9. Continuous indoor cultivation

Since it doesn't require a photoperiod change, you can have a constant 18/6 or 20/4 growing space where different plants can germinate, grow, and flower simultaneously, in different phases.

This facilitates planning, space utilization, and continuous supply.

10. Greater autonomy in automated crops

Autoflowering plants adapt very well to automated growing systems, such as drip irrigation, hydroponics, or aeroponics, thanks to their genetic stability and consistent needs.

This allows for more efficient management and less human intervention.

1. Choose a good substrate

Autoflowering plants need a medium that facilitates rapid root development. Ideally, use a light, well-aerated substrate, which retains moisture without becoming waterlogged. You can mix peat, perlite, and coconut fiber to improve the structure. Avoid substrates that are too nutrient-dense from the start.

2. Use permanent pots

Transplanting stresses autoflowering plants and can slow their growth. Because their cycle is very short, any delay in development directly impacts yield. pots at least 10-15 liters from the very beginning to allow optimal root growth.

3. Plan light exposure

Autoflowering plants don't depend on photoperiod lighting to flower, but they do need plenty of light to reach their full potential. Outdoors, plant them during the months with the most sunlight (April to August in Europe). Indoors, keep them between 18 and 20 hours of light per day throughout the cycle.

4. Control irrigation

Water when the substrate is dry in the first few centimeters, but avoid saturating it. excess of water can slow down growth or cause mushroomsFor the first few weeks, small, frequent doses will suffice. As the plant grows, its water demand will increase.

5. Use mild fertilizers

Autoflowering plants are sensitive to excess nutrients. Start with very low doses (25-50% of the recommended dose) and gradually increase according to the plant's response. Choose specific fertilizers for autoflowering plants or fast-acting, adapted to its accelerated pace.

6. Avoid aggressive pruning

Given its short cycle, it is not advisable to perform severe pruning such as FIM or topping, as the plant does not have enough time to recover. Instead, you can apply gentle techniques such as LST (Low Stress Training) to improve light distribution without slowing down its development.

7. Control the climate, humidity

A controlled environment is key. During the for Growth, the ideal humidity is around 60-70%. In flowering, reduce it to 40-50% to prevent fungus in the buds.

The temperature should be kept between 22 ° C and 28 ° C during the day, with a slight decrease at night.

8. Attention in the first weeks

The The first 15-20 days are decisiveThe plant establishes its basic structure during this time. Any stress (e.g., excess water, fertilizer, or transplants) can stunt its development and reduce the final yield. Observe and act with care.

9. Continuous indoor cultivation

Since it does not require a change in photoperiod, you can have a constant growing space at 18/6 or 20/4, where germination can occur, grow and flower different plants at the same time, in different phases.

This facilitates planning, space utilization, and continuous supply.

10. Harvest at the right time

Do not rush. Examine the trichomes with a magnifying glass: when most of them are milky with some amber, it's the ideal time. Harvesting early reduces potency and flavor, while harvesting late can affect the effect and quality.

Daylight Hours: How Many Hours Do Autoflowering Plants Need?

One of the main advantages of autoflowering plants is their flexibility in lighting schedules. There are three widely used lighting schemes:

• 18/6 (18 hours of light / 6 hours of darkness): It is the most recommended cycle, as it offers a balance between vigorous growth and metabolic recovery during the dark hours.
• 20 / 4: Ideal for growers looking for faster growth and higher yields. It increases photosynthesis, but also reduces power consumption and light stress.
• 24 / 0: Some experienced growers use continuous light throughout the growing season. While this can accelerate growth, it carries a risk of stress and reduced energy efficiency.

Light type: recommended spectra for each phase

Autoflowering plants go through all their stages quickly, so it's advisable to provide a full light spectrum from the start. However, certain nuances can be distinguished depending on the stage:

• Growth phase (days 1-20): They benefit from a light rich in blue (400–500 nm), which stimulates leaf development, rooting and plant compaction.
• Flowering phase (approx. 21-75 days): They require more red (620–700 nm), which promotes bud formation, density, and yield. Adding far red (730 nm) can improve flowering.
• Full spectrum: Full spectrum lamps are the ideal option, as they cover all the needs of the plant during its rapid life cycle.

Light intensity: how much light is enough?

Light intensity is measured in PPFD (Photosynthetic Photon Flux Density) in µmol/m²/s. Autoflowering plants require adequate light intensity without exceeding the intensity, which could cause stress:

• seedlings: 150–300 µmol/m²/s
• Vegetative phase: 300–600 µmol/m²/s
• Flowering: 600–900 µmol/m²/s (although some varieties tolerate up to 1000 µmol/m²/s)

It's important to adjust the height of the lamp according to the wattage and type of fixture to avoid burns. Dimmable LED lights allow you to fine-tune this intensity according to the growing stage.

Suitable types of lighting

Currently, the following types of lighting are most recommended for growing autoflowering plants:

• Full spectrum LED: They are efficient, durable, and emit little heat. Ideal for small and large crops. Some models include adjustable channels for growth and flowering.
• CMH / LEC (ceramic metal halide): They offer a broad spectrum and powerful penetration. They are suitable for intermediate and advanced growers.
• Fluorescent (T5 or CFL): Useful for seedlings and small spaces, although insufficient for flowering in large crops.
• HPS (high pressure sodium): Although they generate more heat and consume more, they are still suitable for flowering if managed well.

Height and light distribution

The compact size of autoflowering plants allows for closer lighting, while still controlling temperature and stress:

• LEDs: between 30 and 60 cm from the canopy, depending on the potency (closer in growth, further away in flowering to better cover the plant).
• fluorescent: between 5 and 15 cm, since they generate little heat.
• HPS / CMH: between 40 and 70 cm, depending on the temperature emitted.

It's advisable to distribute light evenly to prevent side plants from receiving less light. Using reflectors or distribution panels helps maximize coverage.

Light cycle duration

Unlike photoperiod varieties, autoflowering varieties do not require a cycle change to initiate flowering.

This allows the same number of hours of light to be maintained from start to harvest.

However, some growers prefer to reduce to 18/6 in the final weeks to simulate a more natural environment and improve trichome maturation.