The USDA Zone info is a great tool for gardeners to help us estimate 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.

A common way of determining when you can plant asparagus peas is to refer to the USDA zone info for Napa.

Planting Calendar for Asparagus peas

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

Asparagus peas do well in moderate cold which tells us that you can get them planted earlier than other plants that might not handle the cold.

The earliest that you can plant asparagus peas in Napa 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 asparagus peas and expect a good harvest is probably October. You probably don't want to wait any later than that or else your asparagus peas may not have a chance to fully mature. Starting your asparagus peas indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Napa. It might get as low as 25°F during the coldest months of winter.

Always keep in mind that USDA zone info for Napa is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Napa it frosts late in the year after February 15 so just be sure to be ready to cover your asparagus peas in the event of a late frost.

USDA Zone Info for Napa

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Napa

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