What Temperature Is Too Cold For Lettuce?

What temperature is too cold for lettuce? 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.

What temperature will damage lettuce?

Lettuce is considered “hard frost hardy,” which means it can withstand frosts below 28 degrees. If the frost continues unabated, however, the cell walls may form ice, and the plant actually freezes. Freezing is irreversible and will kill a lettuce plant.

Will lettuce grow in 50 degree weather?

Among the most tender of the lot, lettuce grows best at 50 to 60 degrees F; growth slows as temperatures drop. Keep it in a cold frame; when the temperature falls below 30 degrees, lettuce is in trouble. The ideal time to plant fall crops is late summer, when soil temperatures are still warm.

When can I transplant lettuce outside?

Lettuce should be transplanted when the plants are between 2-3 inches tall. You should harden off your lettuce plants 7-10 days before transplanting. Bring them outdoors for a few hours, increasing the length of time each day.

When can I plant my lettuce outside?

When to Sow Lettuce

Make the earliest sowings under cover from late winter to grow on in greenhouse or hoop house beds for a super-early harvest. Then from early spring it's time to sow for growing outside.


Related faq for What Temperature Is Too Cold For Lettuce?


How cold is too cold for vegetables?

A temperature below 32 degrees Fahrenheit is too cold for a vegetable garden. This temperature will cause frost to develop in the garden that can damage the roots, leaves, and fruits in your vegetable garden. You can protect your vegetable garden if the temperature drop is temporary.


Are lettuce seedlings frost hardy?

Lettuce is not hardy but will take a fair degree of cold, so all early and late plants need frost protection. Check out growing Lettuces in Autumn and Winter. Lettuce grows better if it is a little cooler and out of the sun, which if we hit a very hot sunny spell can cause them to bolt.


How do you protect lettuce?


How cold can lettuce seedlings tolerate?

Lettuce can tolerate a few days of temperatures from 80 to 85°F, provided that nights are cool. Lettuce seed will germinate at 35°F, but optimum germination is 70 to 75°F. If the plants are sufficiently hardened, they will withstand freezing.


Will leggy lettuce seedlings survive?

Hardening off the plants or transplanting them outside may also help with legginess. Most leggy plants become sturdier once they are growing outside. Some leggy seedlings can be saved with modified transplanting techniques.


Can I plant lettuce in May?

Lettuce can be planted as soon as the soil can be worked in the early spring.


What month should I plant lettuce?

Lettuce is a cool weather crop and is best grown in spring and fall. The seeds germinate in temperatures as low as 40 F (4 C) but its ideal germination and growing temperature is between 60 and 65 F (16 to 18 C).


How do you take care of a potted lettuce?


How cold can cucumber plants tolerate?

A temperature of 32 degrees Fahrenheit (0 degrees Celsius) or below will result in frost, which will kill cucumber plants. Any temperature below 50 degrees Fahrenheit (10 degrees Celsius) will result in slower growth of cucumber plants, and will eventually damage them.


How cold can celery tolerate?

Semi-hardy vegetables that can withstand light frost of air temperatures in the range of 28 to 32 degrees include beets, spring market carrots, parsnip, lettuce, chard, pea, Chinese cabbage, endive, radicchio, cauliflower, parsley and celery.


How cold can zucchini plants tolerate?

Zucchini is a warm-season crop that cannot tolerate frost or freezing temperatures, so its best to plant your zucchini in the early summer, when temperatures are at least 70 degrees Fahrenheit or more.


Can lettuce be frozen?

Can you freeze lettuce? Not if you want to make tossed salad with the thawed out product. But for cooking and flavoring uses, yes, you can freeze 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.


Can you plant lettuce before last frost?

Most cool season crops, like cabbage, broccoli, lettuce and many others, can tolerate a light frost and will grow best when sown a couple weeks before your last spring frost. Some, like peas and spinach, are so cold-hardy they can even be planted “as soon as the ground can be worked,” as many seed packets say.


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