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 USDA zone info for Rice Lake should be reffered to in order to estimate when it's a good idea to plant coreopsis.

Planting Calendar for Coreopsis

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

Coreopsis are moderately cold tolerant which means that you can plant them a little bit earlier than other frost tender plants.

The earliest that you can plant coreopsis in Rice Lake 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 coreopsis and expect a good harvest is probably August. You probably don't want to wait any later than that or else your coreopsis may not have a chance to grow to maturity. You can get started a little bit earlier by starting your coreopsis indoors.

Last Frost Date

The average date of last frost is May 15 in Rice Lake. You should expect an average low temperature of -30°F in the coldest months of winter.

Since the USDA zone info for Rice Lake is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Rice Lake you get surprised by a frost after May 15 be ready to protect your coreopsis in the event of a surprise late frost.

USDA Zone Info for Rice Lake

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 Rice Lake

You may be interested in your other planting guides for Rice Lake.