Before planting it is a good idea to find your USDA Zone info to determine 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.

One way of estimating when you can plant missouri primrose is to use the USDA zone info for Dayton.

Planting Calendar for Missouri Primrose

Frost tolerance for missouri primrose:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Missouri Primrose do well in some cold which means that you can plant them a little earlier in the year than other plants that might not handle the cold.

The earliest that you can plant missouri primrose in Dayton 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 missouri primrose and expect a good harvest is probably August. You probably don't want to wait any later than that or else your missouri primrose may not have a chance to fully mature. Starting your missouri primrose indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Dayton the average date of last frost happens on May 15. You should expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Dayton is just an average the actual date of last frost will vary from year to year. Since half of the time in Dayton you get a frost after May 15 be ready to cover your missouri primrose if you have a surprise late frost.

USDA Zone Info for Dayton

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Dayton

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