Grodan Gro-Wool Medium Water Absorbent Granulate Rockwool, 3.5 cu ft commercial-greenhouse-fixtures The installer makes a duct

The installer makes a duct cutout and secures the unit with self-tapping sheet metal screws

Greenhouse Supplemental Lighting – Pairs with natural sunlight to extend photoperiods or compensate for low-light seasons

Then LIGHT

Killing hard and soft bodied insects

The trays design also allow for proper air circulation between the wicking mat and the tray bottom providing good air movement and helping to keep the root zone healthy and happy

Grodan Gro-Wool Medium Water Absorbent Granulate Rockwool, 3.5 cu ft commercial-greenhouse-fixtures The installer makes a ductGranulated rockwool can be used alone or as an amendment to organic based mixes. For example, the addition of water absorbant 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 rockwool as potting mix: When you use granulated