To define a number range, you have to create a new number interval: 1  Specify an alphanumeric key with up to 2 characters. 2  Specify the limits of the number interval.  Mark the number range if it is planned for external number assignment.
Inspect the lettuce plants for leaves that are ready to harvest. Most leaves are mature enough once they reach 1 to 3 inches long, but they should still be tender up to 6 inches long. Cut off the outer leaves of the plants with a small pair of garden shears to harvest just a few leaves.
But before washing, when you begin to separate the leaves from a head of lettuce, do so with care, pulling them apart at the base of the stem. Using a salad spinner to remove excess water before you freeze the lettuce is an effective way to reduce the moisture. You can then blot the lettuce dry with paper towels.