One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of figuring out when it's possible to plant tropical hibiscus is to look at the USDA zone info for Glen Ellyn.

Planting Calendar for Tropical Hibiscus

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

It's probably not a good idea to plant tropical hibiscus until after the last frost because they do not do well in cold weather.

The earliest that you can plant tropical hibiscus in Glen Ellyn 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. If you wait any later than that and your tropical hibiscus may not have a chance to really do well. You can get started a couple of weeks earlier by starting your tropical hibiscus indoors.

Last Frost Date

On average the last frost is on April 15 in Glen Ellyn. It might get as low as -15°F during the coldest months of winter.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Glen Ellyn and it changes from year to year. Since half of the time in Glen Ellyn you get a frost after April 15 be ready to cover your tropical hibiscus if you have a surprise late frost.

USDA Zone Info for Glen Ellyn

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 Glen Ellyn

You may be interested in your other planting guides for Glen Ellyn.