Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first opportunity to plant hardy hibiscus in Calistoga should be estimated by referring to the USDA zone info.

Planting Calendar for Hardy Hibiscus

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

Since hardy hibiscus do well in cold you can plant them earlier in the year than other frost tender plants.

The earliest that you can plant hardy hibiscus in Calistoga 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 hardy hibiscus and expect a good harvest is probably October. Any later than that and your hardy hibiscus may not have a chance to grow to maturity. You can get started a little bit earlier by starting your hardy hibiscus indoors.

Last Frost Date

In Calistoga the average date of last frost happens on February 15. In the coldest months of winter you can expect an average low temperature of 20°F.

It's important to remember that USDA zone info for Calistoga is just an average and the actual date of last frost will vary from year to year. Half of the time in Calistoga there is a last frost after February 15 so always be ready to protect your hardy hibiscus if you have a late frost.

USDA Zone Info for Calistoga

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 Calistoga

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