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how to plant weed seeds without soil

RDWC is the easiest system to manage, making it a great option for beginners. You put your germinated plants into individual containers, which you then place into a water container. All you add is some hydro pellets to give the roots some added grip. An air pump ensures a constant air supply into the water. Nutrients are added to the water, which the plants can then absorb through their roots. That means roots are constantly exposed to water throughout the growth cycle. The R in RDWC stands for Recirculating, because the water is constantly pumped around the system in a closed loop.

This is a slightly more complex system to use. NFT stands for Nutrient Film Technique. Here, plants grow with their roots in a wide tube, usually made of PVC. The oxygen-rich water carrying nutrients is pumped from the reservoir to the tubes and back. Tubes should be installed at an angle to ensure ample water flow back into the reservoir. The ‘Film’ in NFT represents the ideal situation in which just a thin filmy layer of water and nutrients flows over and along the roots.

NFT System

4: Air pump. Many hydro setups feature a separate water pump with a filter to keep the water clean while circulating.

Drip irrigation is a popular technique among professional growers all across the agri- and horticulture sectors, but amateur homegrowers will find it very convenient, too. You feed and water your plants using a drip system. Every individual plant gets its own drip nozzle. That allows for very accurate distribution of nutrients, ensuring that every plant gets an equal share. Any liquid not absorbed by the plants flows back into the reservoir for future use.

Using hydroponics for cannabis does come with a few minor drawbacks, though. Firstly, you’ll need to spend more on equipment before you can get your system up and running. Then again, working with the right system eventually pays off in terms of saving on water and electricity.

Made from ultra-thin threads of processed rock, Rockwool is another useful tool for growing weed in water. Like clay pellets, Rockwool is great at retaining water while providing enough room for oxygen flow, making it a perfect and long-trusted replacement for soil for growing weed. Unlike clay pellets though, Rockwool must first be PH treated before it can properly house pot plants which, adding an extra layer of labor to the hydroponic process.

Once you’ve done your research and selected the right medium for your hydroponic grow, the next step is picking the perfect hydroponic system for your personal situation. With thousands of years of history, there are plenty of different ways to grow weed in water. But if you’re wondering how to grow hydroponic weed at home, there are a few tried and true systemic methods that most small-scale growers rely on for propagating a plant that grows without soil.

Rockwool

Just because hydroponic grow systems operate without the use of soil, doesn’t mean that your plants don’t need a little assistance. Instead of traditional dirt, hydroponic growers use a number of different mediums to retain water and nutrients in the roots and promote the flow of oxygen. These are the most common mediums for growing weed without soil:

In an attempt to replicate the natural movement of the tides, Ebb and Flow hydroponic systems use intervals of soaking and draining to feed and water the plants instead of a steady stream of flowing water. Using the same reservoir and grow tray separation, the Ebb and Flow system operates in cycles of all-or-nothing feeding. This results in a flooding of the plant and its roots with nutrient-rich oxygenated water for an extended period. Eventually, it will use gravity to drain, giving the plant maximum amounts of oxygen before the water is recycled and the plant soaked again the next day.

No matter what system you use for your hydroponic home grow, it’s important to make sure that your reservoir water is mixed with the proper nutrients in the right quantity. Because while growing weed in soil comes with built-in nutrients, growing weed in water requires the gardener to fine-tune the plant-feeding themselves. And if you’re growing weed without nutrients, your plants won’t be alive very long.