One of the first steps you take when you are getting a good idea your gardening schedule is find your 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.

The USDA zone info for Columbia should be looked at to determine when 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 when the weather gets warmer.

You should not plant corn salad until after the last frost has passed because they are not cold tolerant.

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. 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 all chance of frost has passed is on April 15 in Columbia. You should expect an average low temperature of 0°F in the coldest months of winter.

Keep in mind that USDA zone info for Columbia is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Columbia you get surprised by a frost after April 15 so make sure that you are prepared to protect your corn salad in the event of one of those late frosts.

USDA Zone Info for Columbia

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 Columbia

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