Loading... Please wait...Milled sphagnum moss is the totally organic growing medium that is ideal for starting all types of flower and garden seeds…safely. Without danger of “damping off” (a disease which attack young seedlings), your seeds have an improved chance of maturing into healthy plants. Milled moss is also a great way to force bulbs such as narcissus, tulips, begonias and gloxinias to enjoy indoors.