Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's possible to estimate when it's a good idea to plant kale by using the USDA zone info for Ironwood.

Planting Calendar for Kale

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

You can plant kale just a bit earlier in the year because they do well in moderate cold.

The earliest that you can plant kale in Ironwood 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. You probably don't want to wait any later than that or else your kale may not have a chance to fully mature. If you are starting your kale indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Ironwood the average date of last frost happens on May 15. In the coldest months of winter you should expect an average low temperature of -30°F.

Keep in mind that USDA zone info for Ironwood may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Since half of the time in Ironwood it frosts late in the year after May 15 be ready to protect your kale in the event of one of those late frosts.

USDA Zone Info for Ironwood

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Ironwood

You may be interested in your other planting guides for Ironwood.