The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can determine when it's the best time to plant asparagus lettuce in Hermiston by using the USDA zone info.

Planting Calendar for Asparagus lettuce

Frost tolerance for asparagus lettuce:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably not a good idea to plant asparagus lettuce until after the last frost because they do not do well in cold weather.

The earliest that you can plant asparagus lettuce in Hermiston is April. However, you really should wait until May if you don't want to take any chances.

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

Last Frost Date

In Hermiston the average date of last frost happens on April 15. You should expect an average low temperature of 0°F in the coldest months of winter.

Since the USDA zone info for Hermiston may not be accurate from year to year the actual date of last frost is different every year. Half of the time in Hermiston last frost occurs after April 15 so make sure that you are prepared to cover your asparagus lettuce if you have one of those late frosts.

USDA Zone Info for Hermiston

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Hermiston

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