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 way of making a decision about when it's a good idea to plant missouri primrose is to look at the USDA zone info for American Canyon.

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 are moderately cold tolerant which means that you can plant them earlier than other frost tender plants.

The earliest that you can plant missouri primrose in American Canyon is January. However, you really should wait until February 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 October. Any later than that and your missouri primrose may not have a chance to grow to maturity. Starting your missouri primrose indoors is a great way to get them started a little bit earlier.

Last Frost Date

In American Canyon the average date of last frost happens on February 15. In the coldest months of winter you can expect an average low temperature of 25°F.

It's important to remember that USDA zone info for American Canyon is just an average and the actual date of last frost changes from year to year. Since half of the time in American Canyon you get surprised by a frost after February 15 be ready to cover your missouri primrose in the event of a late frost.

USDA Zone Info for American Canyon

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in American Canyon

You may be interested in your other planting guides for American Canyon.