Do You Need to Protect Lettuce from Frost in the Garden?
Growing lettuce is a lot like getting along with people. You want to be careful not to expect too much, without expecting too little, either.
Some gardeners want this cool-season vegetable to keep producing in hot weather, for example, and that’s just not possible.
But you may not be aware you can rely on most varieties of Lactuca sativato keep growing as freezing temperatures set in, with some support from you, the gardener.
You will need to protect most types from frost. But when you do, you can expect this species to produce baby leaves and even full-size heads well into late autumn or winter, times of year when fresh greens are so welcome.
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I’d like to encourage you to ask more from your lettuce in the cool months, but only after giving it what it needs to resist frost or survive light freezes.
You’ll be happy to hear it’s much easier to get your crop to meet the expectation that it will survive through a frost than it might be to get a human to start picking up their socks or waking up on time!
I’ll give you some pointers that will make the experience easy.
Here’s what I’ll cover:
Is Lettuce Cold Tolerant?
Lettuce is no Russian kale, which can grow merrily along when temps plummet to -10°F. It’s also less cold-hardy than most other cole crop leafy greens, including spinach, some mustards, and baby leaf brassicas.
But it is a quintessential cool-season crop, and some varieties grow quite well even if the temperature dips below freezing.
Jim Myers, plant breeder and researcher at Oregon State University, describes lettuce as “semi-hardy” vegetables,
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