Lettuce used to be difficult to grow in southern climates, but more recently developed varietals, such as Ithaca lettuce plants, have changed all that. What is Ithaca lettuce? Read onto learn more about growing Ithaca lettuce.
What is Ithaca lettuce?
Ithaca lettuce plants are an open pollinated crisphead lettuce cultivar developed by Dr. Minotti of Cornell University, Ithaca, New York. Ithaca produces typical iceberg tightly wrapped heads about 5.5 inches (13 cm.) across that stay firm and crisp.
They produce excellent crisp leaves suitable for sandwiches and salads. This cultivar has been a popular variety for eastern commercial growers for some time but will work easily in the home garden as well. It is more heat tolerant than other crisphead cultivars and is resistant to tipburn.
How to Grow Ithaca Lettuce
Ithaca lettuce can be grown in USDA zones 3-9 in full sun and well-drained, fertile soil. Sow seeds directly outside after all danger of frost has passed and soil temperatures have warmed, or start seeds indoors a few weeks prior to transplanting outdoors.
Sow seeds about 1/8 inch (3 mm.) deep. Seeds should germinate in 8-10 days. Thin seedlings when the first true set of leaves appear. Cut the thinning rather than pulling it out to avoid disrupting nearby roots of adjacent seedlings. If transplanting seedlings grown inside, harden them off over the course of a week.
Plants should be spaced 5-6 inches (13-15 cm.) apart in rows that are 12-18 inches (30-45 cm.) apart.