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 the best time to plant corn salad by checking out the USDA zone info for Columbia.

Planting Calendar for Corn salad

Frost tolerance for corn salad:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

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

The earliest that you can plant corn salad in Columbia 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

The average date of last frost is April 15 in Columbia. You should expect an average low temperature of -10°F in the coldest months of winter.

Always keep in mind that USDA zone info for Columbia is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Columbia it frosts late in the year after April 15 so make sure that you are ready to cover your corn salad if you have a surprise late frost.

USDA Zone Info for Columbia

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 Columbia

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