When can I plant Kale in Zone 3b

The USDA Zone info is a great tool for gardeners to help us figure out our gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

The USDA zone info for Zone 3b should be looked at to determine when it's a good idea to plant kale.


Planting Calendar for Kale

Frost tolerance for kale: Tolerant of some frost.
When you should plant them: Up to 5 weeks before last frost.

Since kale are one of those plants that can tolerate a little bit of cold weather you can plant them a bit earlier in the year than more sensitive plants.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant kale
Possibly ok, but a risky time to plant kale
Probably not a good time to plant kale

The earliest that you can plant kale in Zone 3b is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant kale and expect a good harvest is probably August. Any later than that and your kale may not have a chance to grow to maturity. If you are starting your kale indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost is on May 15 in Zone 3b. We can expect an average low temperature of -35°F in the coldest months of winter.

It's important to remember that USDA zone info for Zone 3b is just an average and our actual date of last frost changes from year to year. Half of the time in Zone 3b last frost occurs after May 15 so make sure that you are ready to protect your kale if we have a surprise late frost.

USDA Zone Info for Zone 3b

Here is the info for USDA Zone 3b.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-35°F
Highest Expected Low-30°F

This means that on a really cold year, the coldest it will get is -35°F. On most years you should be prepared to experience lows near -30°F.

Plants to Grow in Zone 3b

You may be interested in our other planting guides for Zone 3b.