One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. 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 Glen Carbon should be reffered to in order to estimate when it's a good idea to plant steirodiscus.

Planting Calendar for Steirodiscus

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

Steirodiscus do ok in moderate cold which tells us that you can start planting them slightly earlier than plants that are more sensitive to the cold.

The earliest that you can plant steirodiscus in Glen Carbon 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 steirodiscus and expect a good harvest is probably August. If you wait any later than that and your steirodiscus may not have a chance to really do well. You can get started a couple of weeks earlier by starting your steirodiscus indoors.

Last Frost Date

The average date of last frost is April 15 in Glen Carbon. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Glen Carbon is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Glen Carbon last frost occurs after April 15 so make sure that you are ready to protect your steirodiscus if you have a surprise late frost.

USDA Zone Info for Glen Carbon

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Glen Carbon

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