Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Mount Prospect you can determine when to plant tropical hibiscus by using the USDA zone info.

Planting Calendar for Tropical Hibiscus

Frost tolerance for tropical hibiscus:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably not a good idea to plant tropical hibiscus until after all chance of frost has passed because they do not do well in cold weather.

The earliest that you can plant tropical hibiscus in Mount Prospect 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 fully mature. You can get started a couple of weeks earlier by starting your tropical hibiscus indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Mount Prospect. In the coldest months of winter you can expect an average low temperature of -15°F.

Since the USDA zone info for Mount Prospect may not be accurate from year to year the actual date of last frost is different every year. Half of the time in Mount Prospect you get a frost after April 15 so be sure to be ready to cover your tropical hibiscus if you have one of those late frosts.

USDA Zone Info for Mount Prospect

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 Mount Prospect

You may be interested in your other planting guides for Mount Prospect.