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.

The USDA zone info for Rohnert Park can be used to estimate when to plant coral bells.

Planting Calendar for Coral Bells

Frost tolerance for coral bells:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since coral bells do well in moderate cold you can plant them a little bit earlier in the year than other frost tender plants.

The earliest that you can plant coral bells in Rohnert Park 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 coral bells and expect a good harvest is probably October. Any later than that and your coral bells may not have a chance to fully mature. You can get started a few weeks earlier by starting your coral bells indoors.

Last Frost Date

On average all chance of frost has passed is on February 15 in Rohnert Park. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Rohnert Park may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Rohnert Park there is a last frost after February 15 so make sure that you are prepared to cover your coral bells if you have a surprise late frost.

USDA Zone Info for Rohnert Park

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 Rohnert Park

You may be interested in your other planting guides for Rohnert Park.