If you’re deciding when to sow kale, there are a number of factors to consider. These include the time of year, your growing zone, your desired harvest date, and the available growing conditions.
One of the best things about this hardy green is that it is fairly flexible in terms of when you may start growing it, and a few weeks’ difference won’t set your plants back too much.
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When to Sow Based on Hardiness ZoneYour USDA Plant Hardiness Zone is an important factor to consider when you are deciding what month to sow kale. You can read more about these hardiness zones here.
Those who live in a hardiness zone with a high number can start growing earlier in the spring and later in the fall than those who live in a hardiness zone with a low number. As the hardiness zone number increases, the growing season gets longer.
Other useful information for determining the planting date is your predicted last frost date in the spring, and first frost date in the fall.
When to Sow in the Spring and FallKale is a cool weather crop, so it grows best in the spring and fall and in locations where it can receive plenty of sunlight.
In the spring, you can plant seeds outside immediately after the last frost. At this point, the soil will have warmed enough for germination to occur. You can continue to sow seeds until the end of May.
If you are starting seedlings indoors, sow four to six weeks before the predicted last frost date.
For example, where I live in Zone 7a, the predicted last frost date is April 18. Therefore, I start seeds indoors in trays the first week of
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