One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to determine when it's a good idea to plant calliopsis by referring to the USDA zone info for Grandville.

Planting Calendar for Calliopsis

Frost tolerance for calliopsis:	Not tolerant of frost.
When to plant:	After the last frost has passed.

It's not a good idea to plant calliopsis until after the last frost because they require warm weather.

The earliest that you can plant calliopsis in Grandville is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant calliopsis and expect a good harvest is probably August. If you wait any later than that and your calliopsis may not have a chance to fully mature. You can get started a few weeks earlier by starting your calliopsis indoors.

Last Frost Date

In Grandville the average date of last frost happens on April 15. In the coldest months of winter you can expect an average low temperature of -15°F.

Since the USDA zone info for Grandville is just an average the actual date of last frost will vary from year to year. Since half of the time in Grandville it frosts late in the year after April 15 be ready to protect your calliopsis in the event of a surprise late frost.

USDA Zone Info for Grandville

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Grandville

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