
Growing cannabis can seem difficult for beginners and newbies, especially when they choose the right type of plant to start with. Some strains require strict lighting schedules, careful nutrient management, and a controlled environment. Autoflowers, on the other hand, are known for their simplicity and fast growth, which makes them an attractive option for first-time growers.
Understanding how they differ from traditional photoperiod plants can help new growers make the best decision. Many cultivators, including those who source their seeds from Barney’s Farm, appreciate autoflowers for their quick life cycle and ease of cultivation.
What Are Autoflowers?
Autoflowering cannabis plants automatically transition from the vegetative stage to the flowering stage based on age. This unique trait comes from Cannabis ruderalis, a subspecies that evolved in harsh environments with short growing seasons.
They typically have a shorter life cycle than photoperiod strains, and they often complement their growth in 8 to 12 weeks. This makes them ideal for growers looking for quick results.
Are There Any Downsides to Autoflowers?
Autoflowers’ short life cycle means there is less time for recovery if mistakes are made. Overwatering, nutrient imbalances, or stress from training techniques can reduce yields since the plant does not have time to recover before flowering.
Additionally, they tend to produce smaller plants than photoperiod strains. While this can be an advantage for growers with limited space, those looking for high yields may prefer a photoperiod variety. For first-time growers, choosing the right genetics is key, and there are plenty of options to buy weed seeds in the USA that are suited for different environments.
Why Autoflowers Are Great for Beginners
- Simple Light Requirements
Photoperiod cannabis requires a strict 18/6 light cycle during the vegetative stage and a 12/12 cycle to trigger flowering. Autoflowers, however, do not need these changes. They can grow under a consistent light schedule of 18 to 24 hours per day from seed to harvest. This flexibility makes it easier for beginners to focus on other aspects of plant care without worrying about adjusting timers or light exposure.
- Fast Growth and Short Life Cycle
Autoflowers grow quickly, with many strains reaching harvest in under three months. This rapid cycle allows new growers to see results faster and reduces the waiting time for their first successful harvest. It also provides an opportunity to learn and experiment with multiple grows in a short period.
For those growing in limited spaces or wanting a quicker turnaround, autoflowers offer an excellent solution. Since they spend less time in the vegetative stage, they also require fewer resources than longer-growing photoperiod strains.
- Resilient and Low Maintenance
Because autoflowers have ruderalis genetics, they tend to be more resistant to pests, diseases, and environmental fluctuations. This makes them a great option for growers who may not have perfect conditions or extensive gardening experience.
Although they still need proper care, they generally require less attention than traditional strains. Their ability to withstand minor mistakes makes them a forgiving choice for first-time growers.
Tips to Grow Autoflowers as a Beginner
Choose the Right Growing Medium

Autoflowers do well in light, well-aerated soil that drains easily. Many growers prefer a mix of soil, perlite, and coco coir to promote healthy root development. Avoid heavy soils that retain too much water, as this can lead to root rot.
Use the Right Nutrients
Since autoflowers have a shorter life cycle, they do not need as many nutrients as photoperiod plants. Too much fertilizer can cause nutrient burn, stunt growth, and reduce yields. A mild nutrient solution designed for cannabis can help prevent overfeeding.
Avoid Stressful Training Techniques
While some growers use training methods like topping or supercropping to increase yields, autoflowers do not always respond well to these techniques. Because they flower on a set timeline, any damage or stress can slow down growth without enough time for recovery. Low-stress training (LST), such as gently bending branches, is a safer option for maximizing light exposure without harming the plant.
Maintain a Stable Environment
A consistent temperature and humidity level helps autoflowers thrive. Temperatures between 70–80°F (21–27°C) and humidity around 50–60% during the vegetative stage will promote healthy growth. Lowering the humidity slightly during flowering can help prevent mold and mildew.
Monitor Watering Practices
Autoflowers have a smaller root system, so they do not need as much water as larger photoperiod plants. Watering only when the top inch of soil is dry can prevent issues like root rot and nutrient deficiencies.