Onions & garlic · cool season
Onion
Allium cepa
Ohio is long-day onion country. Use long-day plants (Patterson, Copra, Redwing), not short-day southern types.
- When to plant in Ohio
- Set plants or sets in March–April; start seed indoors in February
- Harvest window
- July–August when tops fall
- Days to maturity
- 90–110 from plants
- Spacing
- 4–6 in.
- Light
- Full sun
How to grow it
Plant as soon as soil can be worked. Keep weeded—onions hate competition. Stop watering when tops go down. Pull, cure in a shed 2 weeks, then store cool and dry. Sets are easiest; plants make larger bulbs.
