Lettuce is said to be one of the few things that is easier to grow than Pepper plants. There is no reason that a garden should not have lettuce planted in it, as it does so well in the filtered shade created under the canopy of your pepper and tomato plants.
Leaf lettuce is very easy to grow from seed and because it is a cool season crop, you will actually plant it 3 or 4 weeks before the last frost in spring. Lettuce grows well in the same type soil as most of your other crops, including your tomatoes and peppers. Since you will be sewing your lettuce seeds or planting your plants a month ahead of your other vegetables, incorporate nitrogen rich amenities like blood meal or black kow manure into your soil.
Warm weather will make your lettuce bolt (bloom). This will make your lettuce taste bitter, therefore be sure to harvest all your lettuce before the heat arrives. If you wait a little bit too long and your lettuce has a little bit of a bitter taste, refrigeration can help get rid of that in many cases. Ideal temperatures for lettuce are between 45 and 80 degrees. Planting it early is critical so it can be harvested before the heat of summer arrives.
Because you need to avoid warm temperatures, fall planting of your lettuce crop ideally should be planted about 4 to 8 weeks before your first Fall frost date. Different types of lettuce require different spacing, therefore read the tag or package for the recommended spacing. Amend your plot with a good flower vegetable soil in order to promote a vast and healthy root system.