The DeGroot Onion Yellow Stuttgarter Vegetable Plants are easy to grow and one of the most popular vegetables in the home garden! They perform best in well-drained, slightly acidic, fertile soil in full sun. Plant in early spring in well-drained, well-cultivated soil. They may be planted so the sets are nearly touching, then harvesting every other one for green table onions when tops reach 6 in. tall. Dry bulbs will be ready for harvest in August or September. Add these onion plants to your vegetable garden so you can bring fresh, delicious flavor your meals.