Leafy greens · cool season
Romaine lettuce
Lactuca sativa var. longifolia
Crisper than leaf lettuce and a little more heat-tolerant, but still a cool-season crop in Ohio.
- When to plant in Ohio
- Start indoors March or direct sow April; fall sowing early August
- Harvest window
- May–June and October
- Days to maturity
- 60–75
- Spacing
- 8–10 in.
- Light
- Full sun to part shade
How to grow it
Transplants give you a head start on spring. Water evenly to prevent tipburn. Parris Island Cos is a long-time Ohio variety. Harvest whole heads in the cool of the morning.
Related leafy greens
Leaf lettuce 30–45 for baby; 45–55 full
Spinach 37–50
Kale 50–65
Swiss chard 50–60