Can kale survive winter conditions?

Kale is one of the hardiest of winter vegetables. Older plants can withstand temperatures as low as -10°F (-23°C) with little more than a winter wrap. Frost, which converts complex starches into natural sugars, has a significant impact on improving the flavor of kale. I pick my sweeter leaves after a cold night in the garden.

Winter daylight affects harvest potential; for active growth, plants need at least 10 hours of daylight. Zones 6 and 7 support harvest until December with the use of row covers. I also like to use reflective mulch to increase light absorption. Plants stop growing when the temperatures are below 20°F (-7 °C), but will resume growth after a thaw.

Frost always excites sugar conversion from the antifreeze compounds always present in the leaves. The maximum sweetness is usually after 3 or 4 light frosts. For this, I examine the leaves every week. Cold-hardened kale contains more vitamin C than the spring crops. Otherwise, protect the plant from scorching winds by erecting a screen of burlap.

Harvesting methods change in cold weather. Pick off all the leaves at mid-day, when the frost has disappeared, though never when the leaves are frozen, or they will be broken in the picking. I keep my winter kale at 32 degrees, with 95% humidity. humidity. With attention, it may be kept producing for six months or longer, even in cold climates.

Choose varieties bred for cold resistance. 'Winterbor' and 'Siberian' are the safest bets in the depths of winter. I succession plant every 3 weeks for a constant harvest. Plant fall crops early so they can mature before those deep freezes set in. You will enjoy your winter garden!

Read the full article: When to Plant Kale: Expert Timing Guide