Spring it the best time to transplant onions.
Indoor Sowing Tips:  1) Sow onion seeds in mid to late winter indoors under T5 grow lights. Onion seeds like temperatures between 60 and 80°F in order to germinate. 2) Sow a bunch of onion seeds 1/4 inch deep together in a 4 inch pot. 3) If the green stem gets taller than 5 inches, then trim them. 4) Carefully separate the seedlings and transplant them in late spring. 5) Based on the variety, you can plant onion seedlings 3 to 4 inches apart or 16 to 9 per square feet. 6) In the spring, I would be ready for temperature swings by using a hoop tunnel and some fabric.
Growing Tips:Â
7) Use drip irrigation. 8) If they need any plant food, give them used coffee grounds or bone meal for root growth. 9) Onions don’t like weeds. If you see any, remove them.
