One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Calistoga can be reffered to in order to figure out when to plant endive.

Planting Calendar for Endive

Frost tolerance for endive:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Endive are moderately cold tolerant which tells us that you can plant them earlier than other plants that might not handle the cold.

The earliest that you can plant endive 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 endive and expect a good harvest is probably October. Any later than that and your endive may not have a chance to really do well. You can get started a couple of weeks earlier by starting your endive indoors.

Last Frost Date

On average the last frost has passed is on February 15 in Calistoga. In the coldest months of winter you should expect an average low temperature of 20°F.

Since the USDA zone info for Calistoga is not always accurate 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 just be sure to be ready to cover your endive in the event of 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.