One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant doronicum in Riverbank can be estimated by looking at the USDA zone info.

Planting Calendar for Doronicum

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

Doronicum do well in moderate cold which tells us that you can plant them earlier than other frost tender plants.

The earliest that you can plant doronicum in Riverbank 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 doronicum and expect a good harvest is probably October. Any later than that and your doronicum may not have a chance to really do well. Starting your doronicum indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is February 15 in Riverbank. You can expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Riverbank is an average the actual date of last frost will vary from year to year. Since half of the time in Riverbank you get a frost after February 15 be ready to protect your doronicum in the event of a late frost.

USDA Zone Info for Riverbank

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 Riverbank

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