The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of making a decision about when you can plant missouri primrose is to consult the USDA zone info for Oak Ridge.

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 are moderately cold tolerant you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant missouri primrose in Oak Ridge 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 grow to maturity. You can get started a few weeks earlier by starting your missouri primrose indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Oak Ridge. It might get as low as 5°F during the coldest months of winter.

Just be sure to remember that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Oak Ridge and it changes from year to year. Half of the time in Oak Ridge there is a last frost after April 15 so make sure that you are ready to cover your missouri primrose if you have one of those late frosts.

USDA Zone Info for Oak Ridge

Here is the info for USDA Zone 7b.

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

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

Plants to Grow in Oak Ridge

You may be interested in your other planting guides for Oak Ridge.