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When to Plant Missouri Primrose in Rock Springs, WY

One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The earliest that you can plant missouri primrose in Rock Springs can be determined by referring to 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.

Missouri Primrose do well in moderate cold which means that you can start planting them earlier than plants that are more sensitive to the cold.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant missouri primrose
Possibly ok, but a risky time to plant missouri primrose
Probably not a good time to plant missouri primrose

The earliest that you can plant missouri primrose in Rock Springs 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. If you wait any later than that and your missouri primrose may not have a chance to really do well. If you are starting your missouri primrose 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 Rock Springs. It might get as low as -20°F during the coldest months of winter.

Since the USDA zone info for Rock Springs may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Rock Springs it frosts late in the year after April 15 so make sure that you are prepared to protect your missouri primrose in the event of a surprise late frost.

USDA Zone Info for Rock Springs

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-20°F
Highest Expected Low-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Rock Springs

You may be interested in your other planting guides for Rock Springs.