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

In Upland you can figure out when to plant asparagus by referring to the USDA zone info.

Planting Calendar for Asparagus

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

You can plant asparagus a lot earlier in the year because they do well in cold.

The earliest that you can plant asparagus in Upland 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 really do well. 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 January 31 in Upland. In the coldest months of winter you should expect an average low temperature of 30°F.

Since the USDA zone info for Upland is an average the actual date of last frost is different every year. Half of the time in Upland it frosts late in the year after January 31 so just be sure to be ready to protect your asparagus if you have a late frost.

USDA Zone Info for Upland

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Upland

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