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How Long to Grow Cannabis

Cannabis Growing Time: Guide to Photoperiod, Fast Flowering and Autoflowering Seeds

Growing cannabis requires an understanding of the different types of seeds and their respective growing times. In this article, we’ll look at grow times for three main categories of cannabis seeds: photoperiod, fast-flowering photoperiod, and autoflowering. In addition, we will separate the cultivation times into indoor and outdoor.

Photoperiod

Indoor

Photoperiod seeds require alternating light to flower. Usually, the culture starts with 18 hours of light and 6 hours of darkness during the growth period (veg stage). The change to 12 hours of light and 12 hours of darkness signals the flowering stage. The total duration of cultivation ranges from 3 to 5 months.

Outdoor

Outdoors, photoperiod seeds rely on the natural change of seasons. The growing season lasts from spring to mid-summer, while flowering begins in late summer and ends in autumn. The total duration of cultivation can reach 6 months.

Fast Flowering

Indoor

Fast photoperiod flowering seeds follow a similar pattern to standard photoperiod seeds, but flowering is faster. They require about 6-8 weeks for the flowering period after switching the light to 12/12. The total duration of cultivation varies from 2.5 to 4 months.

Indoor

Outdoors, fast flowering seeds complete the crop faster than standard photoperiod seeds. Flowering starts earlier in the summer and ends in early autumn, reducing the total growing time to 4-5 months.

Autoflowers

Indoor

Autoflowering seeds do not depend on alternating light to flower. They bloom automatically after 2-4 weeks of growth and flowering lasts 5-7 weeks. The total growing time is 8-10 weeks, making them ideal for quick harvests.

Indoor

Outdoors, autoflowering seeds offer the flexibility of growing at different times of the year. The total cultivation time remains the same, 8-10 weeks, allowing for multiple harvests in a year.

Growing Factors

Aside from the choice of indoors and outdoors, take into the following areas:

• Seed varieties
• Strain characteristic
• Potential yield

1. Seed varieties

2. Strain Characteristics

Strain Characteristics Different strains will carry different growth characteristics. A few factors are at play here:
• Height
• Growth speed
• Bud quality

A plant’s height is going to determine where you can plant it and what will be around it. While some may stay as squatty, compact bushes, others will be tall and lean. Where the buds are concerned, some plants will have denser more aromatic buds while others can be on the subtle side. Higher-quality buds will take longer to grow.

Indica vs. Sativa

The two main distinctions made between strains are Indica and Sativa.

Indica

Indicas tend to be shorter and fatter in stature. The bushy, dense growth usually doesn’t surpass around 152 cm/60 inch.
Their size enables them to be ready in as little as 3 months.
The smell is usually quite strong, which might make them better for indoor growth.
Overall, these strains offer a relaxing full-body experience.

Sativa

On the other hand, Sativas can grow from 180 cm/72 inch up to nearly 300 cm/ 120 inch.
They have a more narrow, loose-leaf look to them with a fruity or floral smell.
Sativas can take up to 2 to 4 months longer to grow.
They produce a more psychoactive, energetic head high, as opposed to Indicas.

Conclusion

The time to grow cannabis depends on the type of seeds and growing conditions. Photoperiod seeds require more attention and time, while fast photoperiod and autoflowering seeds offer faster and more versatile options. Understanding these differences is critical to successfully growing cannabis, whether indoors or outdoors.

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