Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of determining when to plant flower-of-an-hour is to refer to the USDA zone info for Hickory Hills.

Planting Calendar for Flower-of-an-Hour

Frost tolerance for flower-of-an-hour:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Flower-of-an-Hour are barely cold tolerant which tells us that you can start planting them slightly earlier than more sensitive plants.

The earliest that you can plant flower-of-an-hour in Hickory Hills is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant flower-of-an-hour and expect a good harvest is probably August. Any later than that and your flower-of-an-hour may not have a chance to fully mature. If you are starting your flower-of-an-hour indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

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

Just be sure to remember that USDA zone info for Hickory Hills is just an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Hickory Hills you get a frost after April 15 be ready to protect your flower-of-an-hour if you have a 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.