Planting Ginger Root
When you get the rhizomes home, cut or break them into pieces about 2 inches long. Let the cut pieces rest on the kitchen counter for a few days, so the wounds can callous over before planting (otherwise you risk having the rhizomes rot soon after planting).
Before you’re ready to plant the rhizomes, soak them in tepid water for a few hours. Then plant the rhizome pieces horizontally, 2 to 3 inches deep in a pot of sterile, high-quality potting soil. If any of the growth nodes are sprouting green, make sure the green sprouts are facing up. Plant three to four rhizome pieces in an 8-inch-diameter pot; four to six rhizomes in a 12-inch-diameter pot; etc. The rhizomes should not touch each other in the pot. That way, if once piece should develop rot, it won’t spread to the others.
After watering in the pots, put them on a seedling heat mat to raise the soil temperature and speed growth. Put the pots under grow lights or in a bright window if you don’t have a grow light system.