Cut the radish 1 inch from the root end using a kitchen knife. Collect the root ends for planting. The radishes should be cut before harvest to provide the largest roots for regrowth.
Cover the entire cut surface of the radish root in germination gel. Spread the gel over the surface evenly using your fingers.
Dig a hole 2 inches in the soil using a garden hoe. Place the root end into the hole and cover the hole with soil.
Dig a row of holes 2 inches apart from each other. If you dig another row, space the row 10 inches from the previous row.
Store the other radishes for future use.