The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Stone Park you can determine when you can plant trachelium by referring to the USDA zone info.

Planting Calendar for Trachelium

Frost tolerance for trachelium:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's not a good idea to plant trachelium until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant trachelium in Stone Park 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 trachelium and expect a good harvest is probably August. Any later than that and your trachelium may not have a chance to fully mature. If you are starting your trachelium indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

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

Since the USDA zone info for Stone Park is not always accurate the actual date of last frost changes from year to year. Half of the time in Stone Park you get surprised by a frost after April 15 so just be sure to be ready to protect your trachelium if you have one of those late frosts.

USDA Zone Info for Stone Park

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 Stone Park

You may be interested in your other planting guides for Stone Park.