The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for River Grove should be read to estimate when it's the best time to plant mecardonia.

Planting Calendar for Mecardonia

Frost tolerance for mecardonia:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Mecardonia are not cold tolerant which tells us that it is necessary to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant mecardonia in River Grove 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 mecardonia and expect a good harvest is probably August. Any later than that and your mecardonia may not have a chance to fully mature. You can get started a little bit earlier by starting your mecardonia indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in River Grove. You can expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for River Grove may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in River Grove last frost occurs after April 15 so make sure that you are ready to cover your mecardonia if you have a surprise late frost.

USDA Zone Info for River Grove

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 River Grove

You may be interested in your other planting guides for River Grove.