One of the first steps you take when you are making a decision about 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.

The USDA zone info for Gunnison can be looked at to determine when it's possible to plant primroses.

Planting Calendar for Primroses

Frost tolerance for primroses:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Primroses do ok in a bit of cold which tells us that you can plant them earlier in the year than other frost tender plants.

The earliest that you can plant primroses in Gunnison 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 primroses and expect a good harvest is probably August. Any later than that and your primroses may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your primroses indoors.

Last Frost Date

The average date of last frost is May 15 in Gunnison. It might get as low as -30°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Gunnison is not always accurate and the actual date of last frost changes from year to year. Half of the time in Gunnison last frost occurs after May 15 so make sure that you are ready to protect your primroses in the event of a late frost.

USDA Zone Info for Gunnison

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 Gunnison

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