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.

The USDA zone info for Prospect Heights can be reffered to in order to estimate when it's possible to plant chrysocephalum.

Planting Calendar for Chrysocephalum

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

You should not plant chrysocephalum until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant chrysocephalum in Prospect Heights 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 chrysocephalum and expect a good harvest is probably August. If you wait any later than that and your chrysocephalum may not have a chance to really do well. Starting your chrysocephalum indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Prospect Heights. You should expect an average low temperature of -15°F in the coldest months of winter.

Keep in mind that USDA zone info for Prospect Heights is just an average and the actual date of last frost will vary from year to year. Half of the time in Prospect Heights last frost occurs after April 15 so make sure that you are ready to protect your chrysocephalum if you have a surprise late frost.

USDA Zone Info for Prospect Heights

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 Prospect Heights

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