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how to grow deep water culture cannabis

How to grow deep water culture cannabis

As a general rule of thumb, you should completely change your reservoir at least once every two weeks in the vegetative stage, and at least once a week in the flowering stage.

Have you ever heard of hydroponics? Although the term is sometimes used to describe growing cannabis plants in any inert or soilless medium (for example coco coir), it more commonly is used to describe growing with plant roots directly in water and that is what most people think of when they hear the word ‘hydroponics’.

The one I use is pictured here. This “battery-operated siphon liquid transfer pump” uses D batteries so you don’t have to worry about cords. This means that people who grow hydroponically don’t have to plan their grow area for the sake being able to empty/fill their reservoir more easily. It’s a good choice for hobbyist growers with 1 or 2 small reservoirs, though if you’ve got a big tank you’ll want something more powerful that can move a lot of water.

Once you‘ve completed a grow with coco, DWC will seem much easier. That being said, we’ve received many pictures from growers doing DWC amazingly well on their first grow just by following the tutorial!

How often should I give new nutrient water to plants growing in DWC?

Always start with half of the recommended dosage on the schedule provided with your nutrient system. For example, I use General Hydroponics Flora Trio, so I just use the schedule on the back of the bottle divided by 2.

You can grow as many plants as you can fit, but 3+ will definitely be a crowded fit. As much as it pains me to say it, the most efficient configuration is to grow one plant per container. This gives the roots more room to spread out, but more importantly, it gives the leaves and buds room to spread out! It also gives you 5 extra ports to reach the reservoir without having to actually move your plants and possibly disturb the roots.

In short, DWC is growing your plant with its roots in aerated nutrient-water (the air part, provided by bubbles, is very important). Like this:

Checking the pH can be boring/tedious, but it’s also one of the most important factors in any grow, especially in DWC. Good pH management makes for pretty plants and bad pH makes for sickly plants. Think of pH adjustments like a supplement that makes your plants grow better and faster!

How to grow deep water culture cannabis

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