Posted on

dwc cannabis grow guide

Dwc cannabis grow guide

It works like a flood and drain, but the nutrient solutions never drain/get out of the system.

As true Hydroponics in its purest form, Deep Water Culture is definitely among the easiest yet most effective type of Hydroponic systems.

The smaller air bubbles, the better aeration they provide for the nutrient solution because they have more contact surface with the water. The contact between the air bubbles and the water replaces the dissolved oxygen absorbed by the plant roots.

Where to get a ready-made DWC system

Now you need to connect the air pump to the airline, the airline to the airstone and place the airstone in the reservoir. Place the plants which have visible roots growing out of the Rockwool into the reservoir. You can either surround your plants with aforementioned expanding clay growing media or growing media of your choice. Turn on the air pump.

Therefore, every 1-2 weeks (generally the longest you should wait before changing your nutrient solution is three weeks), you should remove your plants from the reservoir to replace and refresh the hydroponic nutrient solution, then place the plants back in the reservoir.

What is Deep Water Culture (DWC)

Typically, you should grow 1-3 plants per bucket. More than that and it can bring a threat of the roots clogging the air stone, and less oxygen absorbed per plant.

You can buy these tools at your local hydroponics or gardening supply store or online.
There are a few words about choosing a reservoir. You should not get a lighter color plastic one as light can pass through it. This will encourage algae to grow, affecting the roots’ health.

Dwc cannabis grow guide

You want to keep your plants short, and should therefore start the flowering stage when your plants are around 1/2 of their final (desired) height. So, if you want cannabis plants with a final height of 48″, start flowering them when they are 24″ tall.

A time-tested, simple nutrient system for growing marijuana hydroponically is the General Hydroponics Trio.

Grow Lights:

You can buy ‘beneficial bacteria’ to introduce to your reservoir. These bacteria will not only outcompete (and thus destroy) the bad bacteria, but it will form a symbiotic relationship with your plants and help them grow. Hydroguard works extremely well for this task, I can’t stress that enough!


There are many lights to choose from and a large number of ways to hang them.

Dwc cannabis grow guide

When the plants are young, their roots won’t be long enough to reach the bottom of your reservoir. During this initial period of growth, it’s important to water your plants from the top.

In the beginning, you won’t need to replace the nutrient solution as frequently compared to when the plant has matured. How often you replace the nutrient solution depends. It could be every one to two weeks or longer.

For the best indoor grow system, refer to the greatest DWC grow start to finish guide for growers of all skill levels. Deep water culture (DWC) systems are popular types of hydroponic systems that use only water, nutrients, and a growing medium to produce stronger roots and better buds.


We recommend using organic nutrients for the best results. If you’re a beginner, consider investing in complete grow systems that include solutions for every stage of growth. Some of the most popular ready-made nutrient options include General Hydroponics’ Flora Grow Series or FoxFarm’s Trio formula.

A major benefit of hydroponic growing is that the plant is being continually watered. However, it’s up to you to add the missing macro and micronutrients to give your plants a fighting chance. In addition, you must regulate the pH, dissolved oxygen, and temperature of your solution throughout the plant’s life cycle.

Water/Nutrient Solution

Advanced top-feeding/dripping systems continuously trickle water over the young plant’s roots. After the plants’ roots have grown enough, some growers switch back to the original DWC set-up.

Recirculating deep water culture is an advanced form of the DWC system. Everything is pretty much the same except for a central main reservoir that connects to multiple bucket distribution lines and the air volume pump that recirculates and aerates the nutrient solution.