When can I plant Missouri Primrose in Zone 4a

One of the best tools that we have as gardeners to help us figure out our gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

You can determine when to plant missouri primrose in Zone 4a by checking out the USDA zone info.


Planting Calendar for Missouri Primrose

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

You can plant missouri primrose a little bit earlier in the year because they do well in moderate 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 Zone 4a 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. If you wait any later than that and your missouri primrose may not have a chance to fully mature. If you are starting your missouri primrose indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Zone 4a. It might get as low as -30°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Zone 4a may not be accurate from year to year and our actual date of last frost changes from year to year. Since half of the time in Zone 4a there is a last frost after May 15 be ready to protect your missouri primrose in the event of a surprise late frost.

USDA Zone Info for Zone 4a

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 Zone 4a

You may be interested in our other planting guides for Zone 4a.