Lettuce

Lettuce plants grow in cool weather, and with a little protection may overwinter. Most dark greens are good sources of Vitamin C and other nutrients. The rule of thumb is, usually, the darker the greens, the more nutritious the leaf.

For a market garden, you will get more income for leaf and lettuce crops per square foot of garden space.


Planting

Early spring is a great time to plant your lettuce seeds. Lettuce likes the cooler temps, generally 40 to 60 degrees F. In warmer climates, you can likely grow lettuce until it reaches about 80 degrees F. If you plant seeds in the spring, you should try to get started at least a month before the hot weather hits your area. You can also plant in the late summer for a fall harvest.

Something new that we are trying this year is the planting of lettuce in a shaded garden under a part of our forest canopy. The trees are large, and tree trunks are spread far apart. This area that is significantly cooler than our open field gardens in the heat of the day. A friend has reported good success with this type of forest planting. We will see how it goes for us this year! (UPDATE, this did not work for us in 2012. I think you have to get the plants started in the early spring. There just was not enough light in this plot to get the lettuce going.)

We make a shallow furrow, and sprinkle in the seeds. Then we cover with the slightest dusting of potting soil to help hold moisture. Some seeds need light to germinate, so don't bury those kind of seeds.

You should see seedlings sprouting in 7 to 10 days. When your lettuce is about 1 to 2 inches high, you should thin the plants a bit so that there is about eight inches of space between each other. If you want to have lettuce growing throughout the season, you can plant different types every few weeks (about 10 to 14 days apart). This is called successive planting. (web)


Planting Record 2012

This late winter, we noticed some small lettuce volunteer plants coming up from the Black Seed Simpson leaf lettuce patch. Last year we allowed the patch to go to seed, and new plants were growing even though there was snow outside. When we could work the soil, we transplanted these into a lettuce bed, and they filled the bed of 4' by 60'. We have been eating this lettuce all spring, and it is just now starting to rise up getting ready to bolt. For the past week or so, we have noticed this lettuce becoming a bit bitter as our temperatures have been rising.

From this experience, we can see that lettuce can really grow early in the season!

On May 21 we planted 5 rows in the woods consisting of:

1. Lettuce Sangria MTO
2. Lettuce Beleah Rose
3. Lettuce Cimmaron
4. Romaine Lettuce Red Amish Deer Tongue
5. Romaine Lettuce Parris Island

As of June 10, we can conclude that we waited too long to plant in the woods, or that our woods are too dark. There are some small weeds growing, but the lettuce planted does not seem to be doing well.


Pests

Lettuce can be attacked by a variety of insects and animals. I have seen small lettuce plants in a green house covered by aphids. Insecticidal soap can be effective deterrent for aphids.

Rabbits and deer could also be attracted to your offering of salad. Fencing is suggested if animal pressure is high.

Harvest

We suggest you harvest in the early part of the day. I think lettuce plants are crisper and a bit sweeter in the early morning as compared to afternoon harvests. Cool lettuce quickly and store them in a cool location. The crop should be cleaned, and then dried to prevent spoilage.


Resources

• Pests of Lettuce (web)