Made of black or white plastic, the Low Profile Reader (2001 or 2001W) can be flush or surface mounted, bracketed, or concealed behind glass, plaster, or other nonmetal surfaces.
Growing Head Lettuce. 1  1. Choose a head lettuce variety for indoor planting. 2  2. Prepare seed trays. 3  3. Sow the seeds 4-6 weeks before the last spring frost.  4. Give the seeds plenty of sunlight and 1  water. 5. Transplant into the garden.  6. Fertilize the lettuce three weeks after 1  transplanting. 7. Cut mature leaves.
Head lettuce, like other kinds of lettuce, has a limited root system that can't go deep in the soil for nutrients. Sometimes an application of extra fertilizer along the way - known as sidedressing - can help. Make a light application of 5-10-10 fertilizer every three to four weeks.