Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Hyrum you can determine when it's possible to plant missouri primrose by checking out the USDA zone info.

Planting Calendar for Missouri Primrose

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

Since missouri primrose do well in moderate cold you can plant them just a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant missouri primrose in Hyrum 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 missouri primrose and expect a good harvest is probably September. Any later than that and your missouri primrose may not have a chance to fully mature. You can get started a little bit earlier by starting your missouri primrose indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Hyrum. You can expect an average low temperature of -15°F in the coldest months of winter.

Keep in mind that USDA zone info for Hyrum is an average and the actual date of last frost changes from year to year. Half of the time in Hyrum you get a frost after April 15 so be sure to be ready to cover your missouri primrose in the event of a surprise late frost.

USDA Zone Info for Hyrum

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Hyrum

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