The Power Of Light Deprivation
2 min

The Power Of Light Deprivation

2 min
Growing Seedshop

In this article, we’ll teach you all there is to know about light deprivation, how it works, and how to practice this technique for yourself so you can grow big yields of high-quality cannabis just like the pros.

Are you growing your own cannabis but struggle to produce impressive buds and big yields? If so, it’s time you learnt about the power of light deprivation.

This essential grow technique is used by expert cultivators from around the world, allowing them to control the exact flowering time of their plants and produce high amounts of mind-blowing weed.

In this article, we’ll teach you all there is to know about light deprivation, how it works, and how to practice this technique for yourself so you can grow big yields of high-quality cannabis just like the pros.


In simple terms, light deprivation is a process used to force plants to bloom outside of their normal flowering period.

After leaving their plants to mature for a certain amount of time, cannabis cultivators expose them to shorter light periods in order to induce flowering.


In order to answer this question, it’s important to understand the central role that light plays in the cultivation of cannabis. Apart from being a major source of energy for plants, light controls when a cannabis plant blooms. When growing in nature, the plant flowers only once in its life, during the fall/autumn period. This is when the days get shorter and the plant experiences shorter periods of light exposure.

Shorter light period

While a plant could be left to bloom immediately, doing so produces low yields and low-quality cannabis. Hence, cultivators tend to let their plants vegetate or mature for a few weeks before forcing them to flower. In turn, they are able to produce larger harvests and a higher quality end product.


According to High Times grow expert Nico Escondido, a cannabis plant needs to be exposed to at least 16 hours of light per day in order to keep it from flowering.

“In order to keep a plant in vegetation and to garner a healthy, well-developed specimen, a young seedling should be grown for four to six weeks before flowering is induced. During this time, the plant should get a minimum of 16 hours of light, but 18-20 hours is a safer bet”, writes Nico.

16 hours of light

Once a plant has matured to a point where it can produce a decent harvest, it should be exposed to an even 12 hours of light and 12 hours of complete darkness in order to induce flowering.

12/12 lightcycle

To do this indoors, you’ll need to have access to a quality grow light in order to ensure your plants are able to generate enough energy to produce high-quality flowers. During the dark periods, you’ll also need to make sure your plants are in complete, undisturbed darkness. This will trick your flowers into thinking that summer is over and that it is time to ripen.

In order to get this balance right, it's best to set up a grow station inside a dark cupboard or closet and use a timer for your light.

If you plan to grow outdoors, managing this balance will be a little trickier; you’ll need to make sure your plants are in a location that receives constant, direct sunlight for at least 12 hours per day. You’ll also need to find a way to expose your plants to complete, uninterrupted darkness.

“This can be done using shades or curtains along the sidewalls and roof of a greenhouse or by installing hoop coverings in the garden”, writes Ed Rosenthal, a leading authority on marijuana.

However if you manage to perfect light deprivation outdoors, you’ll be able to produce high yields of quality cannabis by simply capitalizing on the power of the sun, a natural and free source of energy for your plants.

If this isn’t possible, it’s a good idea to move your plants into an indoor grow station where you can time your photoperiods exactly.


Caramel Automatic Zamnesia

Thanks to new innovations in cannabis genetics, autoflowering seeds are a simple way to ensure high yields and high-quality cannabis without having to expertly time light/dark periods.

Unlike traditional cannabis strains, autoflowering plants bloom with age rather than changing light periods. Most autoflowering strains deliver after only 10 weeks.

For a list of our top 10 autoflowering cannabis seeds, click here. For more information about cannabis and additional grow tips, make sure you regularly visit our blog.

Caramel Auto Zamnesia


  Guest Writer  

Written by: Guest Writer
Occasionally we have guest writers contribute to our blog here at Zamnesia. They come from a wide range of backgrounds and experiences, making their knowledge invaluable.

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