Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Bethalto should be used to estimate when you can plant forget-me-not.

Planting Calendar for Forget-Me-Not

Frost tolerance for forget-me-not:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Forget-Me-Not are one of those plants that can tolerate a little bit of cold weather which means that you can plant them a little bit earlier than plants that are more sensitive to the cold.

The earliest that you can plant forget-me-not in Bethalto is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant forget-me-not and expect a good harvest is probably September. Any later than that and your forget-me-not may not have a chance to fully mature. If you are starting your forget-me-not 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 Bethalto. You should expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for Bethalto is not always accurate the actual date of last frost changes from year to year. Since half of the time in Bethalto it frosts late in the year after April 15 be ready to cover your forget-me-not in the event of a late frost.

USDA Zone Info for Bethalto

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 Bethalto

You may be interested in your other planting guides for Bethalto.