When planting kohlrabi, select a location with full sun and work in a general purpose to help promote quick growth. Kohlrabi plants do not need deep soil as it is the stem that grows into a bulb, just plenty of water and well drained soil. Harvest when the root gets larger than a tennis ball. Pick as much as you need, and let the remainder continue to grow. All of our Kohlrabi Plants for sale are shipped with very well-established root systems. We guarantee them to arrive alive and thriving.