Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By referring to the USDA zone info for Washington it's possible to determine when it's a good idea to plant corn salad.

Planting Calendar for Corn salad

Frost tolerance for corn salad:	Not tolerant of frost.
When to plant:	After the last frost.

Since corn salad require warm weather you have to wait until after the last frost before you can plant them.

The earliest that you can plant corn salad in Washington 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 corn salad and expect a good harvest is probably August. If you wait any later than that and your corn salad may not have a chance to fully mature. You can get started a few weeks earlier by starting your corn salad indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Washington. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Washington is an average the actual date of last frost is different every year. Half of the time in Washington you get surprised by a frost after April 15 so make sure that you are prepared to cover your corn salad in the event of one of those late frosts.

USDA Zone Info for Washington

Here is the info for USDA Zone 6a.

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

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

Plants to Grow in Washington

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