One of the best tools that you have as gardeners to help us figure out 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.

It's possible to figure out when it's a good idea to plant asparagus by looking at the USDA zone info for Riverbank.

Planting Calendar for Asparagus

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

Since asparagus do well in cold you can plant them a lot earlier in the year than other plants that might not handle the cold.

The earliest that you can plant asparagus in Riverbank 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 and expect a good harvest is probably October. Any later than that and your asparagus may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your asparagus indoors.

Last Frost Date

On average all chance of frost has passed is on February 15 in Riverbank. You can expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Riverbank is an average the actual date of last frost will vary from year to year. Half of the time in Riverbank you get a frost after February 15 so always be ready to cover your asparagus in the event of a surprise late frost.

USDA Zone Info for Riverbank

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 Riverbank

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