Grodan Gro-Wool Medium Water Absorbent Granulate Rockwool, 3.5 cu ft

Granulated stone wool can be used alone or as an amendment to organic based mixes. For example, 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. The water repellent granulates are superior substitutes for aerators such as perlite or Styrofoam. The granulate is prilled for easy mixing.

Granulated stone wool as potting mix: When you use granulated stone wool to pot up your plants, the great advantage is that you never have to change the mix. The stone wool will last for the life of your plant. Stone wool’s high water holding capacity will enable you to go on vacation without worrying about your plants drying out.