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

A common way of figuring out when it's possible to plant missouri primrose is to consult the USDA zone info for Latrobe.

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 a little earlier in the year than other frost tender plants.

The earliest that you can plant missouri primrose in Latrobe 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. If you are starting your missouri primrose indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Latrobe the average date of last frost happens on April 15. It might get as low as -10°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Latrobe is just an average and the actual date of last frost is different every year. Since half of the time in Latrobe you get surprised by a frost after April 15 be ready to cover your missouri primrose in the event of a surprise late frost.

USDA Zone Info for Latrobe

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 Latrobe

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