Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of getting a good idea when it's possible to plant coreopsis is to check out the USDA zone info for Owosso.

Planting Calendar for Coreopsis

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

Coreopsis tend to make it in a little bit of cold which tells us that you can plant them a little bit earlier in the year than more sensitive plants.

The earliest that you can plant coreopsis in Owosso 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 fully mature. Starting your coreopsis indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Owosso. In the coldest months of winter you should expect an average low temperature of -10°F.

Remember that USDA zone info for Owosso may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Owosso last frost occurs after April 15 so be sure to be ready to cover your coreopsis if you have one of those late frosts.

USDA Zone Info for Owosso

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Owosso

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