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.

By referring to the USDA zone info for Larkspur you will be able to figure out when it's possible to plant dusty miller.

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 are one of those plants that can tolerate quite a bit of cold weather which tells us that you can plant them a quite a bit earlier than more sensitive plants.

The earliest that you can plant dusty miller in Larkspur 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 grow to maturity. If you are starting your dusty miller indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost has passed is on February 15 in Larkspur. You should expect an average low temperature of 25°F in the coldest months of winter.

Remember that USDA zone info for Larkspur may not be accurate from year to year and the actual date of last frost will vary from year to year. Since half of the time in Larkspur last frost occurs after February 15 be ready to cover your dusty miller in the event of one of those late frosts.

USDA Zone Info for Larkspur

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 Larkspur

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