The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant gayfeather in Ironwood should be determined by checking out the USDA zone info.

Planting Calendar for Gayfeather

Frost tolerance for gayfeather:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Gayfeather can survive in pretty solid cold which means that you can plant them quite a bit earlier in the year than more sensitive plants.

The earliest that you can plant gayfeather 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 gayfeather and expect a good harvest is probably August. You probably don't want to wait any later than that or else your gayfeather may not have a chance to fully mature. If you are starting your gayfeather indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Ironwood the average date of last frost happens on May 15. It might get as low as -30°F during the coldest months of winter.

Remember that USDA zone info for Ironwood is an average and the actual date of last frost changes from year to year. Half of the time in Ironwood you get a frost after May 15 so make sure that you are prepared to protect your gayfeather if you have a surprise late frost.

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.