One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's possible to determine when you can plant pole beans by looking at the USDA zone info for Sonora.

Planting Calendar for Pole beans

Frost tolerance for pole beans:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's probably a bad idea to plant pole beans until after the last frost has passed because they require warm weather.

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

The last month that you can plant pole beans and expect a good harvest is probably September. If you wait any later than that and your pole beans may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your pole beans indoors.

Last Frost Date

The average date of last frost is February 15 in Sonora. In the coldest months of winter you can expect an average low temperature of 20°F.

It's important to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Sonora and it will vary from year to year. Since half of the time in Sonora there is a last frost after February 15 be ready to cover your pole beans if you have one of those late frosts.

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.