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.

It's possible to figure out when it's the best time to plant dusty miller by looking at the USDA zone info for Del Rio.

Planting Calendar for Dusty Miller

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

You can plant dusty miller earlier in the year because they do well in cold.

The earliest that you can plant dusty miller in Del Rio 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. If you wait any later than that and your dusty miller may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your dusty miller indoors.

Last Frost Date

In Del Rio the average date of last frost happens on February 15. You can expect an average low temperature of 20°F in the coldest months of winter.

Keep in mind that USDA zone info for Del Rio may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Del Rio you get a frost after February 15 so make sure that you are ready to cover your dusty miller in the event of a surprise late frost.

USDA Zone Info for Del Rio

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Del Rio

You may be interested in your other planting guides for Del Rio.