One of the first steps you take when you are determining 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.

In San Marino you can determine when it's the best time to plant dusty miller by using the USDA zone info.

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 do well in cold which tells us that you can plant them much earlier than plants that are more sensitive to the cold.

The earliest that you can plant dusty miller in San Marino 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. Any later than that and your dusty miller may not have a chance to really do well. Starting your dusty miller indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is January 31 in San Marino. In the coldest months of winter you should expect an average low temperature of 30°F.

Since the USDA zone info for San Marino is just an average the actual date of last frost will vary from year to year. Half of the time in San Marino you get a frost after January 31 so be sure to be ready to cover your dusty miller in the event of a late frost.

USDA Zone Info for San Marino

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in San Marino

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