One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to estimate when it's possible to plant sanvitalia by reviewing the USDA zone info for Merrill.

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.

You can plant sanvitalia slightly earlier in the year because they are one of those plants that can tolerate a tiny bit of cold weather.

The earliest that you can plant sanvitalia in Merrill 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 sanvitalia and expect a good harvest is probably August. Any later than that and your sanvitalia may not have a chance to fully mature. If you are starting your sanvitalia indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Merrill the average date of last frost happens on May 15. You can expect an average low temperature of -30°F in the coldest months of winter.

Keep in mind that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Merrill and it is different every year. Since half of the time in Merrill you get a frost after May 15 be ready to protect your sanvitalia in the event of a late frost.

USDA Zone Info for Merrill

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Merrill

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