The USDA Zone info is a great tool for gardeners to help us estimate your gardening 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 the best time to plant hardy hibiscus is to examine the USDA zone info for Sturgeon Bay.

Planting Calendar for Hardy Hibiscus

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

Hardy Hibiscus tend to make it in pretty solid cold which means that you can plant them a lot earlier in the year than more sensitive plants.

The earliest that you can plant hardy hibiscus in Sturgeon Bay 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. If you are starting your hardy hibiscus indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Sturgeon Bay. It might get as low as -15°F during the coldest months of winter.

It's important to remember that the actual date of last frost is an average because it is based on the USDA zone info for Sturgeon Bay and it changes from year to year. Since half of the time in Sturgeon Bay last frost occurs after April 15 be ready to protect your hardy hibiscus if you have one of those late frosts.

USDA Zone Info for Sturgeon Bay

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 Sturgeon Bay

You may be interested in your other planting guides for Sturgeon Bay.