The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant tropical hibiscus in Willowbrook should be figured out by reviewing the USDA zone info.

Planting Calendar for Tropical Hibiscus

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

Tropical Hibiscus require warm weather which means that it is necessary to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant tropical hibiscus in Willowbrook 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 tropical hibiscus and expect a good harvest is probably August. Any later than that and your tropical hibiscus may not have a chance to really do well. You can get started a little bit earlier by starting your tropical hibiscus indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Willowbrook. You should expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Willowbrook is just an average the actual date of last frost will vary from year to year. Since half of the time in Willowbrook you get a frost after April 15 be ready to cover your tropical hibiscus if you have one of those late frosts.

USDA Zone Info for Willowbrook

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 Willowbrook

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