One of the first steps you take when you are estimating your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to figure out when it's possible to plant dusty miller by looking at the USDA zone info for San Ramon.

Planting Calendar for Dusty Miller

Frost tolerance for dusty miller:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Dusty Miller tend to make it in cold weather which means that you can plant them a lot earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant dusty miller in San Ramon 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 dusty miller and expect a good harvest is probably October. You probably don't want to wait any later than that or else your dusty miller may not have a chance to fully mature. You can get started a little bit earlier by starting your dusty miller indoors.

Last Frost Date

In San Ramon 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.

Keep in mind that USDA zone info for San Ramon may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Since half of the time in San Ramon it frosts late in the year after February 15 be ready to cover your dusty miller in the event of a late frost.

USDA Zone Info for San Ramon

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 San Ramon

You may be interested in your other planting guides for San Ramon.