When to Plant Missouri Primrose in Portsmouth, NH

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

You will be able to figure out when you can plant missouri primrose by using the USDA zone info for Portsmouth.


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 can survive in mild cold which means that you can plant them a little earlier in the year than other plants that might not handle 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 Portsmouth 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 fully mature. You can get started a couple of weeks earlier by starting your missouri primrose indoors.

Last Frost Date

On average the last frost is on April 15 in Portsmouth. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Portsmouth may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since half of the time in Portsmouth it frosts late in the year after April 15 be ready to cover your missouri primrose in the event of a surprise late frost.

USDA Zone Info for Portsmouth

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-10°F
Highest Expected Low-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Portsmouth

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