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How to Grow Lettuce, Planting Lettuce, Growing Leaf Lettuce
How to grow lettuce from seeds or transplants when home vegetable gardening. Learn how to plant lettuce seeds indoors for transplant into the garden at planting time.
Lettuce is one of the standby crops of the early spring garden.
After discovering how to plant lettuce, always make sure to have small crops on hand to move into the garden whenever you can.
Every variety of lettuce, including leaf and head lettuce, grows rapidly and thrives in cool weather.
Planting Lettuce in February
For many gardeners, the lettuce season begins in February so you can set out sturdy seedlings as soon as weather permits.
Begin by sowing in the hotbed, where lettuce does exceptionally well.
Whether in the greenhouse or in the hotbed, lettuce seedlings will need to be transferred to individual compartments in six packs or thinned after a couple of weeks to prevent overcrowding.
There are inexpensive alternative designs in making a hotbed.
While hotbeds are nowhere near the size of a greenhouse, they can be used in the same fashion.
A hotbed is simply a cold frame with heat.
In years past, a layer of fermenting horse manure would have provided this heat, now days the job is done by heating cables.
Select a bright, sunny spot in your garden for the hotbed. Begin by excavating an area 4 feet square and 1 foot deep.
On the bottom put 4 inches of coarse gravel to provide drainage.
Lay a sheet of 1/8 inch pegboard over the gravel, treated side down, and then staple the heating coil to the pegboard to keep the cable in its place.
Hotbed cables have thermostats that prevent the temperatures from falling below 68 degrees.
Lay a 4 foot square sheet of ½ inch galvanized hardware cloth over the cables to protect them from misguided jabs of a spade or trowel.
Over the cloth spread 2 inches of coarse builders' sand to help distribute the heat evenly.
Six inches of planting medium, a combination of equal parts peat moss, topsoil, and sand makes the final layer of the hotbed.
With the cold frame box in place over the heated foundation, the hotbed is ready for seed operation.
How to Grow Lettuce
Planting Lettuce in March
In March, a second leaf lettuce crop can be sown.
Put about a dozen lettuce seeds into a 4 inch pot filled with potting soil and cover them lightly with 1/8 inch of peat moss.
Bottom water, drain, and keep indoors provided with sunlight.
The seedlings will be up in a matter of a few days.
Sow a sparse, closely spaced row of leaf or head lettuce in the hotbed as well.
The lettuce plants will only be here for a short time so they do not need much room.
Begin Harvesting Lettuce in April
Lettuce sown in February in the hotbed is on the dinner table by April.
Sprinkle the seeds in a shallow row in the hotbed.
Thin the plants as they grow big enough to touch each other.
When they are about 2 inches tall, move them to individual 3 inch pots to be set into the cold frame for a couple of weeks of hardening off.
Transplant them into the open garden in April.
Harvesting Lettuce
How to Grow Lettuce All Season Long
You can harvest succulent lettuce throughout the growing season and sometimes into early December by using cold frames and cloches.
These vegetable gardening techniques can extend the growing crop a month or more beyond the first killing frost.
How to Grow Lettuce Through the Fall
Lettuce can be kept in the open garden through the fall without the protection of cloches or cold frames if the temperature drops steadily night by night, allowing the plants to harden their growth.
If freezing weather arrives overnight even the ordinarily frost-tolerant lettuce plants will be killed outright unless they are covered with leaves, straw, or overturned containers for temporary protection.