One of the first steps you take when you are estimating your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of figuring out when it's the best time to plant sanvitalia is to look at the USDA zone info for Bonne Terre.

Planting Calendar for Sanvitalia

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

Sanvitalia can survive in very little cold which means that you can plant them slightly earlier in the year than other plants that might not handle the cold.

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

Last Frost Date

The average date of last frost is April 15 in Bonne Terre. It might get as low as -10°F during the coldest months of winter.

It's important to remember that USDA zone info for Bonne Terre is not always accurate and the actual date of last frost is different every year. Since half of the time in Bonne Terre last frost occurs after April 15 be ready to protect your sanvitalia in the event of one of those late frosts.

USDA Zone Info for Bonne Terre

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 Bonne Terre

You may be interested in your other planting guides for Bonne Terre.