When can I plant Skullcap in Evanston, IL

One of the best tools that we have as gardeners to help us determine our gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

By reviewing the USDA zone info for Evanston you will be able to determine when it's possible to plant skullcap.


Planting Calendar for Skullcap

Frost tolerance for skullcap: Not tolerant of frost.
When you should plant them: After all chance of frost has passed.

You really shouldn't plant skullcap until after the last frost because they require warm weather.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant skullcap
Possibly ok, but a risky time to plant skullcap
Probably not a good time to plant skullcap

The earliest that you can plant skullcap in Evanston 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 skullcap and expect a good harvest is probably August. Any later than that and your skullcap may not have a chance to fully mature. Starting your skullcap indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Evanston the average date of last frost happens on April 15. We should expect an average low temperature of -15°F in the coldest months of winter.

Always keep in mind that USDA zone info for Evanston is just an average and our actual date of last frost can change quite a bit from year to year. Since half of the time in Evanston last frost occurs after April 15 be ready to protect your skullcap if we have a late frost.

USDA Zone Info for Evanston

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 Evanston

You may be interested in our other planting guides for Evanston.