Question
What type of  container should an onion plant be put in?

Answer
Onion plants can be put in most any type of pot. Suggest that it be at least 8 inches in diameter and about 10 inches deep. Use a good poting soil. Keep the soil moist but not wet. Best to water about every 3 days. The plant will need plant food that you can get locally.

Best wishes and good growing.

Don Battles