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.
3. Trim back the entire plant when it reaches 3 to 6 inches high, or approximately every 10 days. Cut back to within 1 to 2 inches of the ground. Most loose-leaf lettuce varieties grow back from a severe trim to produce more leaves.
One of the best ways to take this cutting is with a utility knife or razor blade. You need the outer layer of the stem attached to the petiole. Start about 1/4 inch above the petiole and cut a circle, spacing the leaf petiole in the middle of the circle. Peel the heel cutting away from the plant stem.ne of the best ways to take this cutting is with a utility knife or razor blade. You need the outer layer of the stem attached to the petiole. Start about 1/4 inch above the petiole and cut a circle, spacing the leaf petiole in the middle of the circle. Peel the heel cutting away from the plant stem.