Question: How Do You Grow Lettuce In Hot Climates?

How hot is too hot for lettuce?

Lettuce is a cool-season vegetable, meaning it grows best in temperatures around 60 – 65°F.

Once temperatures rise above 80°F, lettuce will normally start to “bolt” or stop leaf production and send up a stalk to flower and produce seed.

The leaves become bitter at this stage..

What is the ideal temperature for growing lettuce?

Lettuce is adapted to cool growing conditions with the optimum temperatures for growth of 60 to 65°F. At 70 to 80°F, the plants flower and produce seed. Lettuce can tolerate a few days of temperatures from 80 to 85°F, provided that nights are cool.

Why is my Buttercrunch lettuce tall?

Most lettuce varieties are cool season crops. When the hot weather comes, they send up tall stalks that will flower and set seed. You’ll notice that the leaves begin to taste bitter around the same time the stalks elongate. This is called bolting.

How long does lettuce take to grow?

6 to 8 weeksHow Long Does It Take Lettuce to Grow? Lettuce grows fairly quickly. Leaf varieties reach maturity in 30 days but can be harvested as soon as they reach the desired size. Other types of lettuce require 6 to 8 weeks to reach full harvest size.

What is the lowest temperature lettuce can withstand?

How to Grow: Lettuce is a cool-weather crop that thrives in the temperature range 60-65 degrees F, and if thoroughly hardened, most varieties survive temperatures as low as 20 degrees F. Cold-adapted varieties survive much lower temperatures. Seed germinates best at about 75 degrees F.

How do you grow lettuce in hot weather?

Meet the Heat ChallengeGrow loose leaf varieties that are heat-resistant or slow-bolting, rather than varieties that form heads. … Use transplants or germinate seeds indoors in containers away from heat.Provide shade. … Don’t skimp on water. … Mulch lightly with an organic mulch to retain soil moisture.

What temperature will kill lettuce?

Colder temperatures (26-31 degrees F.) may burn foliage but will not kill broccoli, cabbage, cauliflower, chard, lettuce, mustard, onion, radish, and turnip. The real cold weather champs are beets, Brussels sprouts, carrots, collards, kale, parsley, and spinach.

How many hours of sun does lettuce need?

12 hoursAll types of lettuce are short-day plants, which means the plants only need 10 to 12 hours of sunlight daily.

Does freezing ruin lettuce?

The reason you won’t be able to use the frozen lettuce to make salads is because the freezing process causes ice crystals to form in plant cells. When ice crystals form, they rupture cell walls. … But lettuce has such a high water content that freezing produces more of a slimy mess.

Does lettuce like hot weather?

Lettuce grows best in a temperature range of about 45 to 75 F. In weather hotter than this, the leaves begin to get bitter to the taste. When leaf lettuce bolts—begins to send up its flower shoots—it’s a signal that the production of edible lettuce is done for the season.

What lettuce grows well in summer?

Loose leaf lettuces are nutritious and heat tolerant. Plus, they are more forgiving of poor soil and imperfect growing conditions, making them easy to grow. Green Star, Magenta, Bronze Arrow Lose Leaf, Red Salad Bowl Oakleaf and Oakleaf Looseleaf Lettuce are all heat tolerant varieties that do well in late summer.

Does lettuce like full sun?

Soil, Planting, and Care. Although lettuce grows fastest in full sun, it is one of the few vegetables that tolerates some shade. In fact, a spring crop often lasts longer if shaded from the afternoon sun as the season warms. You can grow lots of lettuce in a small space, even a container.

Can I grow lettuce in the shade?

Among vegetables, leafy greens are the most tolerant of shade, including kale, lettuce, spinach, arugula and chard. Related to both beets and spinach, Swiss chard tastes a little like both and is fairly easy to grow.

Can lettuce be grown all year round?

Lettuce is generally considered a cool weather plant, grown in early spring or fall, although it can be grown in the warm season in most of the SF Bay Area by choosing varieties adapted to warmer weather. Check seed catalogs for summer lettuces.