One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Detroit you can figure out when it's possible to plant coreopsis by using the USDA zone info.

Planting Calendar for Coreopsis

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

Coreopsis can survive in mild cold which means that you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant coreopsis in Detroit is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant coreopsis and expect a good harvest is probably September. Any later than that and your coreopsis may not have a chance to really do well. Starting your coreopsis indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Detroit. In the coldest months of winter you can expect an average low temperature of -5°F.

Since the USDA zone info for Detroit is an average the actual date of last frost will vary from year to year. Half of the time in Detroit last frost occurs after April 15 so always be ready to cover your coreopsis if you have a late frost.

USDA Zone Info for Detroit

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Detroit

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