Grodan Granulated stonewool can be used alone or mixed with another loose medium such as expanded clay rocks.
The addition of water absorbent granulate to peat mixes at 25-50% volume increases water holding capacity and aeration, improving plant growth and shelf life.
Bags are 4 cubic feet and 50 lbs.
• On its own as a potting mix
• Mix with any potting mix to improve aeration and water holding capacity
• Mix water absorbent granulate into your sandy garden soil to improve water holding capacity