Seedling Heat Mat growing-media Grodan Gro-SmartTM Tray

Grodan Gro-SmartTM Tray

Organic dairy manure is the primary input

works with most fixtures

Now backed by Hydrofarm

The PHB4020 ballast's high-frequency design is optimized for double-ended 1000W HPS lamps

Seedling Heat Mat growing-media Grodan Gro-SmartTM TrayHydrofarm's windowsill heat mat is perfect for veteran growers, beginners, and children too. It is the perfect size for small growing spaces, and improves germination by warming the root area 10 20F over ambient temperature. By warming the roots, you increase your growing success, as this mat will maintain a controlled temperature all season long. If you ever dreamed of growing a windowsill container garden but found the area just a bit too drafty,