ANSWER: Kale will grow throughout the summer in USDA hardiness zones 7 through 10, but in hot weather, it tends to become tough and bitter.That’s why gardeners should start their kale seeds six weeks before the last frost of spring in their region, so the plants have time to mature before really hot weather rolls in.It resists heat well and is slow to bolt or stretch, with leaves that are easy to strip for quick preparation in cooking.Red Ursa has thick, frilly oak-shaped leaves that are deep green with pretty reddish purple veins.Squire is a sweet, tender kale that can be chopped and eaten raw in salads or used in stir-fries, with flavor that sweetens in cold weather when frost hits.Tronchuda/Tronchuda Beira: This Portugese kale variety has large leaves with a flat, round shape similar to collard greens. .

10 Tips for Growing Kale

Here’s how to grow your own kale, whether you’re planting directly into the ground or using a container garden.Plant your crop again in the fall, six to eight weeks before the first expected frost — you can keep harvesting even after snowfall.Plant more seeds or transplants every two to three weeks for a long, continuous harvest.Planting Kale.Harvesting Kale.Always leave a few of the small central leaves attached to encourage growth.This content is imported from {embed-name}. .

How to Help Your Crops Endure Hot Weather

Shade tunnel with integrated fiberglass hoops makes it easy to provide shade to an 8' long garden row.Knowing which plants like it hot and which would prefer air conditioning, you can help your vegetables and flowers survive — and even thrive in — hot weather.Heat loving plants are thirsty: the average tomato plant needs more than 30 gallons of water in a season.Cool-Weather Crops These plants don't tolerate hot weather.In the vegetable garden, it's the cool weather crops — lettuce, spinach, arugula, broccoli, kale, cauliflower, peas, cilantro — that suffer in hot weather.Even with an abundant and consistent supply of water, when temperatures rise over 80 degrees, these plants tend to stop growing, go to seed, or just give up the ghost.In hot weather, heat-sensitive crops want protection from both heat and sun.Most importantly, it keeps soil and air temperatures as much as 10 degrees cooler (lettuce seeds germinate poorly in soil temperature higher than 70 degrees).This shade netting protects heads of lettuce from sun and heat.Cool-weather perennials that flower in spring and early summer often have a hard time with heat.These get their blooming work out of the way early so they can kick back when temperatures gets hot.Trim back foliage that's not fresh and healthy.If you haven't done so already, mulch around the plants to keep the soil cool and water as needed during hot weather to keep the soil from drying out. .

Heat Tolerant Greens: Varieties for the Hottest Summer Months

As a general rule for specialty greens, the types that make a bigger frame as full-size plants will do better in the heat, i.e. resist rapid bolting, even as baby greens.For lettuces, there are similar big differences in bolt resistance between varieties, though the differences do not have as much to do with frame size.

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heat tolerance of kale

Can it be grown in summer as well, or will it bolt due to the heat, and will it's flavor be horrible if grown in hot weather? .

When Should I Plant Kale? Read Before You Plant – Bountiful

Kale is quickly becoming my favorite leafy salad green, and what I’ve found is that unlike lettuce and spinach, kale can be grown in any time of the year without turning bitter.When Should I Plant Kale?Kale can be planted any time from 8 weeks before your average first frost date to late summer (or about 80 days before your last frost date), and can be direct sown outdoors or indoors.If I want more kale plants later on and have the space for it, I will sow more seeds up to August so my kale seedlings have enough time to grow quickly in the warm weather before colder temperatures slow down growth.Lettuce, spinach, and arugula, for example, will all bolt (produce a flower stalk) when the weather gets too hot.While kale tastes sweeter in cool weather, it grows faster in warm weather. .

Heat Tolerant Seeds - Organic Varieties

We also seek out highly heat-tolerant versions of warm-weather crops, such as heat-tolerant tomatoes with the ability to set fruit even during the summer heat of southern growing zones. .

How to Grow Kale

Another of those glorious cool season dark leafy greens, kale holds the promise of a happy palate, full stomach and good health.Not my favorite kale because icky things hide in those tight little ruffles, inducing vicious bugs (an exaggeration, perhaps) and dirt.You can also find kale that’s an extremely dark green, upright, and sturdy with a rough texture.Cold climate cultivators who till soil that doesn’t fully thaw until late April, may want to get a jump start on the season by starting seeds indoors about a month or two before the last frost date, setting out the plants when they have at least two true leaves.If you garden in a mild or warm climate you can skip this step, unless you just like starting flats of seeds in advance.As the ambient air temperature and soil heat up to 80°F and beyond, your kale will grow, but it’s going to end up like an old naked guy getting some steam in a sauna—flaccid, bitter and just not that appetizing.Full sun will do a plant well, but for folks living in hot sunny areas, a little shade might be just what the garden doctor ordered.kale has been known to tolerate temperatures as low as 20°F (on those days when the meteorologist didn’t see that cold front coming).Folks living in warm and hot climates direct seed (or transplant if you must) so that the vegetable comes to harvest before day time temperatures exceed 80°F.Just don’t let them get overly dry or the leaves will will end up tough, like some punk kid smoking unfiltered cigarettes outside of the mall.For wormy and caterpillary critters, you can achieve control by hand picking or by spraying Bacillus thuringiensis. .

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