romaine lettuce growing temperature

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.

1. How cold can Romaine lettuce tolerate?
2. What temperature is too cold for lettuce?
3. Does romaine lettuce need full sun?
4. When should I plant romaine lettuce outside?
5. At what temperature should I cover my lettuce?
6. What temp can lettuce tolerate?
7. What is the maximum cold holding temperature for shredded lettuce?
8. Will Snow kill lettuce?
9. Should I soak lettuce seeds before planting?
10. How do I know when my romaine lettuce is ready to pick?
11. How do you keep romaine lettuce from bolting?
12. How do you harvest lettuce so it keeps growing?
13. Why is my romaine lettuce growing tall?
14. What month do you plant lettuce?
15. How long does romaine lettuce take to germinate?
16. Is butterhead a lettuce?
17. What temperature will kill vegetables?
18. How do you grow lettuce in hot weather?
19. Can you revive frozen lettuce?

How cold can Romaine lettuce tolerate?

A brief frost is unlikely to hurt romaine, or any, lettuce unless it becomes an extended event. 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.

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.

Does romaine lettuce need full sun?

Unlike most of the vegetables in your garden, romaine lettuce likes some afternoon shade. Whether you're planting seeds or seedlings, choose a spot that has morning and early afternoon sun. Lettuce also needs lots of water--be sure to water frequently if you're planting lettuce in containers.

When should I plant romaine lettuce outside?

You can begin planting leaf, romaine and butterhead lettuce as soon as the soil can be worked in the spring. Depending on the variety, lettuce germinates in temperatures between 40 to 85 degrees F. If you plant lettuce in successive plantings, with 10 to 14 days in between, you'll have an extended harvest.

At what temperature should I cover my lettuce?

Lettuce And Frost: Does Lettuce Need To Be Protected From Frost. Lettuce is a veggie that does best when grown in cooler, moist conditions; temperatures between 45-65 F. (7-18 C.) are ideal.

What temp can lettuce tolerate?

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.

What is the maximum cold holding temperature for shredded lettuce?

FDA food-safety officials say that cutting or tearing salad greens provides opportunities for microbial invasion of tissues. Refrigerating them at 41 degrees F or less inhibits growth and promotes general die-off of pathogens such as E. coli O157:H7, Salmonella, and Listeria monocytogenes.

Will Snow kill lettuce?

Snow on the winter vegetable garden does not mean the end of harvest. ... A killing frost or freeze will do more damage to winter vegetables than snow. Carrots, turnips, Brussels sprouts, and cabbage, chard, and head lettuce can be harvested from under a blanket of snow.

Should I soak lettuce seeds before planting?

Imbibing or soaking the seeds in cool water for 16–24 hours in a well-lit area before planting will increase the germination percentages greatly.

How do I know when my romaine lettuce is ready to pick?

Squeeze the heads to check. An immature romaine head is loose and compresses easily, while an overly ripe head feels hard to the touch. Harvest the lettuce when it reaches between 6 and 8 inches tall, with leaves that begin to tighten. Check the romaine in the morning when it nears harvest time.

How do you keep romaine lettuce from bolting?

If you plant lettuce late and wish to avoid premature lettuce bolt, try using a shade cloth over the row to reduce the intensity of the light. Additionally, it is essential to fertilize new plants with a 10-10-10 fertilizer. Make sure the plants receive plenty of moisture.

How do you harvest lettuce so it keeps growing?

Cut the outer lettuce leaves about 1 inch above the crown. This protects the crown so the lettuce can continue growing. Cut off the amount of lettuce needed when the leaves reach a length between 3 and 6 inches. Water the lettuce regularly to encourage continued growth even after you begin harvesting.

Why is my romaine lettuce growing tall?

ANSWER: Lettuce plants that suddenly start stretching toward the sky and growing extra tall are likely to be bolting. ... When your lettuce bolts, the flower stalk draws energy and nutrients away from the lettuce leaves, making them more bitter and reducing their quality the longer the stalk remains on the plant.

What month do you 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). To grow great lettuce, find a site that offers at least six to eight hours of direct sun.

How long does romaine lettuce take to germinate?

Romaine takes 75 to 85 days and crisphead 70 to 100 days.

Is butterhead a lettuce?

Butter lettuce is a type of lettuce that includes Bibb lettuce and Boston lettuce. It's known for loose, round-shaped heads of tender, sweet leaves and a mild flavor. All varieties of butterhead lettuces have smooth, loosely-coiled leaves that are often sold with the roots still attached to preserve freshness.

What temperature will kill vegetables?

Light freeze - 29° to 32° Fahrenheit will kill tender plants. Moderate freeze - 25° to 28° Fahrenheit is widely destructive to most vegetation. Severe or hard freeze - 25° Fahrenheit and colder causes heavy damage to most plants.

How do you grow lettuce in hot weather?

Meet the Heat Challenge

1. Grow loose leaf varieties that are heat-resistant or slow-bolting, rather than varieties that form heads. ...
2. Use transplants or germinate seeds indoors in containers away from heat.
3. Provide shade. ...
4. Don't skimp on water. ...
5. Mulch lightly with an organic mulch to retain soil moisture.

Can you revive frozen lettuce?

To revive your lettuce, the answer is simple—it needs to be rehydrated. Once water within those cells is replenished in the process known as osmosis, your lettuce will be as good as new (or nearly so).