20 degrees F..
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.
What temperature 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 handle a freeze?
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.
What temps 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.
Do I need to cover my lettuce plants?
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.
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.
Can lettuce survive 32 degrees?
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.
At what temperature should I cover my vegetable garden?
When Should You Cover Plants? Cover your plants at night and remove them during the day when the temperatures rise above 32 degrees F, so that the soil can warm up again. Some outdoor plants won’t survive the harsh conditions of winter, bring them inside and use these tips for caring for them through winter.
What temperature should lettuce be stored at?
Recommendation: To reduce the risk of pathogen growth, maintain cut leafy greens at 41 ° F (5 °C) or less during storage and display. Routinely monitor the temperature of the product and the equipment used to maintain product temperature.
Can lettuce survive snow?
Carrots, turnips, Brussels sprouts, and cabbage, chard, and head lettuce can be harvested from under a blanket of snow. Scallions and fall leeks to the size of scallions can be harvested from under snow.
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?
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.
Should you water plants before a freeze?
Cold weather prep for plants in winter
Drought-stressed plants are more susceptible to cold damage, so watering plants a few days in advance of a cold snap is beneficial. Watering just before the freeze can help too by creating warmth, and the water loses its heat slowly over the hours into the colder temperatures.
Will 36 degrees hurt plants?
Frost Advisory – This is when the temperature is expected to fall to 36 degrees to 32 degrees Fahrenheit. Freeze Warning – This is issued when there is at least an 80% chance that the temperature will hit 32 degrees Fahrenheit or lower. Light freeze – 29° to 32° Fahrenheit will kill tender plants.
How do I protect my lettuce in the winter?
For best results, cover plants with a sturdy cloche. The warmer temperature inside will encourage strong plant growth in autumn, and protect them from the worst of the weather in winter.
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 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.
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.
How cold can tomato plants tolerate?
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 strawberries tolerate?
30 degrees
Strawberry flowers can be damaged or killed at temperatures of 30 degrees or lower. Young green fruit are slightly hardier, withstanding 30 degrees but receiving damage at 28. Because they are lower to ground, strawberries are much easier to protect with covers than blueberries or fruit trees.
Will cardboard boxes protect plants from frost?
From that experience, I’ve found the best frost protection for your outdoor plants is either free or cheap. Cardboard boxes and brown grocery sacks make perfect frost cover and at the end of the season can be recycled. I keep various boxes on the patio and when frost is forecast simply put one over the plant.
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