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.

One way of estimating when you can plant scutellaria is to look at the USDA zone info for Glen Ellyn.

Planting Calendar for Scutellaria

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

It's not a good idea to plant scutellaria until after the last frost because they do not do well in cold weather.

The earliest that you can plant scutellaria in Glen Ellyn 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 scutellaria and expect a good harvest is probably August. If you wait any later than that and your scutellaria may not have a chance to really do well. If you are starting your scutellaria indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Glen Ellyn 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 Glen Ellyn is an average the actual date of last frost changes from year to year. Since half of the time in Glen Ellyn you get a frost after April 15 be ready to cover your scutellaria if you have one of those late frosts.

USDA Zone Info for Glen Ellyn

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 Glen Ellyn

You may be interested in your other planting guides for Glen Ellyn.