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

One way of making a decision about when it's the best time to plant asparagus peas is to examine the USDA zone info for Umatilla.

Planting Calendar for Asparagus peas

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

You can plant asparagus peas a little bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant asparagus peas in Umatilla 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 asparagus peas and expect a good harvest is probably September. You probably don't want to wait any later than that or else your asparagus peas may not have a chance to fully mature. If you are starting your asparagus peas indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Umatilla. You should expect an average low temperature of 5°F in the coldest months of winter.

Since the USDA zone info for Umatilla is just an average the actual date of last frost is different every year. Half of the time in Umatilla last frost occurs after April 15 so be sure to be ready to protect your asparagus peas in the event of a surprise late frost.

USDA Zone Info for Umatilla

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Umatilla

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