Little Gem Lettuces are very small Romaine (Cos) lettuces that will grow 5 to 8 inches within 70 days of planting. The leaves are the same color as Romaine, but a bit more tender and sweet. They are often eaten with most of the outer leaves removed, leaving just the lettuce heart.
Plant the Little Gem seeds 1/8 inch deep, 1 inch apart, in rows spaced 16 inches apart. Don’t pack the soil over the seeds, just cover them lightly. Water the planting bed to 3 inches in depth. The best methods are drip irrigation or using a hose attachment with a fine mist setting. The key is to not wash the seeds away when you water. Keep the soil moist at all times.
Thin the Little Gem seedlings when they have their third set of leaves. They should be placed at least 6.5 inches apart. Continue to water the seedlings, ensuring that the soil remains moist.