cannabis grow light cycle

Generally speaking, it takes anywhere from 10-32 weeks, or about 3-8 months, to grow a weed plant from seed. It’ll be quicker if you start with a clone or an autoflower seed.

How long does it take to grow a marijuana plant?

Be mindful to increase your watering as the plant develops. When it’s young, your plant will need water close to the stalk, but as it grows the roots will also grow outward, so start watering further away from the stalk in the soil so roots can stretch out and absorb water more efficiently.

Vegetative stage

The biggest variability in how long a marijuana plant takes to grow will happen in the vegetative stage—after the seedling phase and before flowering.

Cannabis grow light cycle

1. Germinating: 1-7 days
2. Seedling: 2-3 weeks
3. Vegetative: 2-8 weeks
4. Pre-Flowering: 1-2 weeks
5. Flowering: 6-8 weeks
6. Harvesting

How to tell if your plant is a male or female

4. Pre-flowering

The quality of your plant depends on your knowledge of the cannabis growth stages and the lifecycle of your plants.

It can take anywhere from 4 to 8 months to grow a cannabis plant, this varies based on where you’re growing. If you have an indoor grow room, your plant has the ability to flower after only a few weeks!

5. Flowering

Cannabis growth is made up of a series of stages that plants undergo during their lifecycle. Each stage during the cannabis cultivation process requires its own unique demands, including different levels of light, water, and nutrients.

Cannabis grow light cycle

For example, in California, we have the following light schedules throughout the year:

Adjusting and controlling them closely is the best way to provide ideal conditions for your plants to grow but if you’re looking to get the most out of every single plant you should adjust the growing conditions according to how your plants react, and this can even happen with plants from the same seed pack because, as mentioned, all plants are different.

Photoperiodic Plants

But not all indoor light fixtures provide a full spectrum so if you’re an indoor grower, you will have to get either a full-spectrum LED or combine both MH and HPS light bulbs to get the ideal plant growth.

Light Spectrum For Plants In The Vegetative Stage

Like we said above, photoperiodic cannabis depends solely on the amount of light and darkness to start flowering, which can be tricky for new growers outdoors but when growing indoors, we are in full control of everything, including the light schedule.