|From the pages of Kitchen Gardener Magazine
Cut-and-Come-Again Lettuce Sampler
A whole palette of colorful varieties delivers a leafy feast
Most of the dozen or so lettuce varieties were the type described as cutting lettuces, which obligingly and vigorously sprout a fresh crop of leaves when they are snipped off just a couple of inches above the ground. They are often called cut-and-come-again lettuces.
Cutting lettuces are mostly non-heading leaf varieties from two groups, Grand Rapids and oakleaf. The Grand Rapids group produces broad, crinkled, and frilly leaves, while the oakleaf varieties have flatter and distinctively lobed leaves. Both groups include red and green varieties and several red-green combinations. All make great garden design elements.
Paint the garden with lettuce
'Black Seeded Simpson' is so reliable I use it as the standard for judging the germination success of other varieties. A fast grower, it produces crinkly, juicy, yellowish-green leaves. Its only shortcoming is a tendency to bolt in summer heat; it does best in spring and fall here on Long Island.
One of the best summer performers I have found is a romaine: a French cos, 'Craquerelle du Midi'. When every other lettuce in my garden is getting bitter or defiantly announcing its plans to set seed, this one stays mild and leafy.
Tops for reliability, even through a hot summer, is 'Red Sails'. Another All-America Selections winner, it's a fast grower with green and reddish-bronze leaves.
Stepping beyond the looseleaf varieties, there are some butterheads and romaines I like to grow as cutting lettuces. They will also sprout new leaves, if less energetically than the looseleaf varieties.
Better ways to sow small seeds
Because they are harvested while very young, cutting lettuces can be planted in fairly dense bands. Instead of broadcasting seed, it is just as easy to sow rows about 3 inches apart, with 1/2 inch to 1 inch between plants in the row. I have found that it takes less time to plant seed carefully than to thin seedlings; besides, if not done properly, thinning often disturbs the roots of the seedlings that are left.
There are several ways to sow seed to eliminate thinning. Simplest is to mix the seed with dry builder's sand (not salty beach sand), using about twice as much sand as seed. This makes it easier to dribble seeds at fairly even spacing down a marked row. An inexpensive little gadget that distributes seed much better than a seed packet is the Seed Sower, which has five different-size outlets to control the flow of seeds down a tapered spout.
For garden rows, my old reliable is an Earthway Seeder, for which I now have a dozen seed plates for different seed types and spacings. It makes a furrow, plants the seed at whatever depth I want, covers it, and firms the ground, all in one pass.
Last season I experimented with the Pinpoint Precision Seeder, which can handle six seed sizes. It's smaller and more maneuverable than the Earthway, and works well with a finely tilled, debris-free bed, but is a bit finicky in less-than-perfect conditions. A larger version sows four rows 2-1/4 inches apart, perfect for mesclun.
If enough space is available, or just to confuse pests, I sometimes skip the cut-and-come-again routine in favor of harvest, hoe, rake, and reseed. I harvest the young plants, roots and all, stir the soil up with a stirrup hoe, rake the bed flat, and sow fresh seed.
Keep the soil rich
Lettuce likes a fairly rich, sandy loam. I till the beds and let them settle for a week before applying about an inch of well-rotted manure or compost, which I work into the near-surface zone with the stirrup hoe. After harvesting leaves, I revive the plants with a weak fish or seaweed emulsion, or manure tea. I have a siphon gadget on my drip irrigation system that allows me to feed emulsion or filtered manure tea down the lines. Most drip systems can be fitted with something similar.
Lettuce will grow, if not thrive, in less than ideal soil, but one thing it must have is water, about an inch per week. Drip irrigation puts water only where a plant needs it. Overhead watering wastes a lot of water, and at the wrong time, such as late in the day or in hot, muggy weather, encourages fungal diseases.
Slugs love lettuce as much as I do, but luckily they seem to prefer beer. A few saucers of stale beer help them drown their sorrows and themselves. I tried sugar water once, which worked, but my bees liked it even more than the slugs did.
Cutworms can be a hassle, but usually they won't do too much damage to a fairly dense band of plants. Untilled soil can harbor cutworms, so I till my beds in spring while the weather is still cold enough to kill overwintered cutworm pupae and eggs. If cutworms become a real problem, I add parasitic nematodes to the soil about a week before planting.
Lettuces make a versatile crop
In the home garden, sowing every week will ensure a constant and generous supply of lettuce. Each sowing yields three or four cuttings before the plants are exhausted. As a rough guide to quantity, sowing about 3 feet of row every week will keep one omnivorous adult well supplied with salad from spring to fall; a vegetarian might consume twice as much.
Lettuces prefer cool temperatures, but by sowing every week, choosing heat-tolerant varieties, and using shade-cloth tunnels, I can produce lettuce right through my Zone 7 summers. It is easy to keep the supply going right into winter by growing winter varieties in cold frames or tunnels of row-cover fabric. The same tunnels can be used, covered instead with 50 percent shade cloth, to protect heat-sensitive lettuce from summer sun.
And just because it's hot doesn't mean I stop sowing lettuce. When temperatures hit the 80s, lettuce seed will not germinate, so I start seeds in flats in a cool room indoors and set the plants in the garden when they have two sets of true leaves.
From early spring until the start of winter, I cut lettuces and keep several salad bowls generously supplied. But lettuce is good for more than just salads. Try it in a creamy soup or wrapped around vinegared sushi rice for a tempting appetizer.
You can purchase seed for the lettuce varieties discussed in this article -- and dozens of others as well -- from many companies (see Sources for lettuce seed).