The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Sonora you can estimate when to plant salsify by looking at the USDA zone info.

Planting Calendar for Salsify

Frost tolerance for salsify:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

You can plant salsify slightly earlier in the year because they do ok in moderate cold.

The earliest that you can plant salsify in Sonora is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant salsify and expect a good harvest is probably September. You probably don't want to wait any later than that or else your salsify may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your salsify indoors.

Last Frost Date

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

Keep in mind that USDA zone info for Sonora is an average and the actual date of last frost is different every year. Half of the time in Sonora there is a last frost after February 15 so make sure that you are prepared to protect your salsify if you have a surprise late frost.

USDA Zone Info for Sonora

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 Sonora

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