One of the best tools that you have as gardeners to help us determine 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.

You should be able to estimate when it's a good idea to plant corn salad by using the USDA zone info for Marshall.

Planting Calendar for Corn salad

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

It's not a good idea to plant corn salad until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant corn salad in Marshall 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 really do well. 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 Marshall. You should expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Marshall may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in Marshall you get a frost after April 15 be ready to protect your corn salad in the event of one of those late frosts.

USDA Zone Info for Marshall

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Marshall

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