The USDA Zone info is a great tool for gardeners to help us estimate 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.

A common way of determining when it's possible to plant hardy hibiscus is to refer to the USDA zone info for Flat Rock.

Planting Calendar for Hardy Hibiscus

Frost tolerance for hardy hibiscus:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

You can plant hardy hibiscus much earlier in the year because they are very cold tolerant.

The earliest that you can plant hardy hibiscus in Flat Rock 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 hardy hibiscus and expect a good harvest is probably September. If you wait any later than that and your hardy hibiscus may not have a chance to really do well. You can get started a little bit earlier by starting your hardy hibiscus indoors.

Last Frost Date

In Flat Rock the average date of last frost happens on April 15. It might get as low as -5°F during the coldest months of winter.

Always keep in mind that USDA zone info for Flat Rock may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Flat Rock last frost occurs after April 15 so always be ready to cover your hardy hibiscus in the event of one of those late frosts.

USDA Zone Info for Flat Rock

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 Flat Rock

You may be interested in your other planting guides for Flat Rock.