How to use: Fill the net pots, use them, refill them, reuse them, and repeat. These three-inch Heavy Duty Net Cups are built to last, but they're also built to grow! Though strong, their mesh bottoms are designed to promote root development.Grodan details: Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the requirement of the plant in the different plant stages. Grodan has a tremendous capacity for absorbing nutrient solution while retaining plenty of oxygen for rapid plant growth. Grodan comes in graduated sizes. Seedlings started in cubes are easily transferred to blocks and then onto slabs, if desired. Seedlings or cuttings started in the Grodan cubes can also be transplanted into more traditional planters and growing mediums. Hydroton details: Hydroton or "expanded clay," is a lightweight gravel which is manufactured specifically for hydroponic cultivation. This media is the first choice for many commercial Dutch growers specializing in flower and vegetable cultivation. Not to be confused with many other kinds of expanded clay which look similar but which are often toxic, Hydroton is pH stabilized and releases practically no minerals into the nutrient stream; in other words Hydroton is almost completely inert - except for offering excellent moisture and oxygen capacity to stimulate healthy root development.
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