How Cold Can You Grow 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 temp is too cold for lettuce?

Lettuce may cope with light freezing and even one or two hard freezes, but once the thermometer reads 25°F or below, the plants are in danger. That level of cold causes ice to form in the plant tissue, regardless of the amount of moisture in the air.

Can lettuce survive a hard freeze?

Lettuce is tolerant of cold temperatures for short periods of time, although growth will slow down. To protect lettuce in frost-prone areas, plant romaine or butterhead lettuce, which are the most cold-tolerant. When frost is predicted, cover the garden with sheets or towels to provide some protection.

Is 40 degrees 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.

Can I grow lettuce in the winter?

It thrives in cool to cold temperatures and is ideal for growing in winter or to overwinter as an extra-early crop. Each head forms a dense rosette of light green leaves.

Should lettuce be covered for frost?

All types of lettuce, including romaine (also called cos) are cold-weather vegetables that can withstand brief frosts and even freezes, although they may experience some outer leaf damage.

When should I plant lettuce outside?

You should transplant lettuce outside after it has grown undercover for 4-6 weeks, and reached the height of 2-3 inches. The earliest time to do this is 3-4 weeks before the last frost, but you can transplant lettuce any time after that. Allow for 7-10 days of hardening off before moving outside. What is this?

How cold can cucumber plants tolerate?

Cucumber plants only tolerate temperatures down to 55℉ (13℃) before their growth starts to falter. On top of that, cucumber seeds will only germinate when soil temperatures are above 65℉ (18℃). Because cucumbers are not cold-tolerant, it’s important to protect them from cold weather and frost.

Will 45 degrees hurt tomato plants?

Is 45 Degrees Too Cold For Tomatoes? A temperature of 45 degrees Fahrenheit (7.2 degrees Celsius) may not cause severe, immediate damage to your tomato plants, especially if you protect them. However, it can cause them to produce less pollen during the flowering stage.

Will lettuce grow in 50 degree weather?

One of the easiest plants to grow in the fall is lettuce. Considered both a spring and fall crop, lettuce thrives when temperatures are between 60 to 70 degrees F. In fact, lettuce tastes sweetest in cool weather, which is why it is such a great fall crop.

What temp is too cold for seedlings?

The general rule of thumb is that most plants freeze when temperatures remain at 28°F for five hours. Of course, there are exceptions to this rule. Seedlings, with their tender new leaves, often give up the ghost when temperatures dip to 32-33°F.

Can you grow lettuce in January?

Cool season cole crops, such as broccoli, cabbage, cauliflower, kale, and other cooking greens, as well as lettuce, grow quickly and can be started indoors mid-January to be ready to transplant into the garden in about eight to ten weeks, just in time for early spring weather.

Can I plant lettuce in January?

Greens such as lettuce, chard, and arugula can be planted throughout the winter, but make sure to research which best suits your climate during cold weather months. Snowdrops are one of the heartiest blooms around, even producing buds when snow blankets the ground.

Can I plant lettuce in December?

Considering the vegetables that you can plant in November and December, lettuce is the vegetable that can truly be grown anywhere there is light, soil and water.

What is the best lettuce to grow in winter?

Hi Joan, the best cold hardy winter lettuce varieties are Cos, Tom Thumb, Little Gem, Lamb’s Ear lettuce, Corn Salad, loose leaf varieties such as oak leaf green and red, mesclun winter greens, there is a hearting variety called Imperial Triumph that is cold tolerant.

What temperature is too cold for spinach?

Keep the cover on until the weather warms. Optimum growing temperature is 50⁰ F to 60⁰ F, but young seedlings can tolerate temperatures as low as 15⁰ F to 20⁰ F. Try to keep the soil consistently moist because spinach will bolt if the soil dries out.

How late can u plant lettuce?

If you are buying transplants (small plants) from a garden center or nursery, you may plant between 2 weeks before your last spring frost to 2 weeks after your last spring frost. In most regions, it’s possible to plant another crop of lettuce in the fall or even early winter.

Will lettuce grow back after cutting?

Lettuce regrows once its leaves have been cut or picked off the main stem. As long as the root is intact in the ground and there are at least 1-2 inches of stem and leaves at the base, lettuce will shoot new growth in as little as a week. The cut-and-come-again harvesting method is the most popular.

What temp is too cold for tomatoes?

Low Temperatures
Although tomato plants can survive temperatures down to 33 degrees Fahrenheit, they show problems when temperatures drop below 50 degrees F, according to the U.S. Department of Agriculture Research Service.

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.

What temperature kills tomatoes?

Tomato plants die when the temperature goes below the 32 degrees Fahrenheit (0 degrees Celsius) mark.