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

It's possible to determine when to plant four-o-clock flower by reviewing the USDA zone info for Hickory Hills.

Planting Calendar for Four-o-clock flower

Frost tolerance for four-o-clock flower:	Not tolerant of frost.
When to plant:	After the last frost.

You really shouldn't plant four-o-clock flower until after the last frost because they require warm weather.

The earliest that you can plant four-o-clock flower in Hickory Hills 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 four-o-clock flower and expect a good harvest is probably August. Any later than that and your four-o-clock flower may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your four-o-clock flower indoors.

Last Frost Date

In Hickory Hills the average date of last frost happens on April 15. In the coldest months of winter you can expect an average low temperature of -15°F.

Since the USDA zone info for Hickory Hills is an average the actual date of last frost changes from year to year. Half of the time in Hickory Hills you get a frost after April 15 so always be ready to cover your four-o-clock flower if you have a surprise late frost.

USDA Zone Info for Hickory Hills

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 Hickory Hills

You may be interested in your other planting guides for Hickory Hills.