When to Plant Oxalis in Mattoon, IL

One of the best tools that you have as gardeners to help us estimate your gardening schedule is the 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.

A way of making a decision about when it's a good idea to plant oxalis is to examine the USDA zone info for Mattoon.


Planting Calendar for Oxalis

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

Oxalis do not do well in cold weather which means that you need to wait until it warms up after the last frost has passed before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant oxalis
Possibly ok, but a risky time to plant oxalis
Probably not a good time to plant oxalis

The earliest that you can plant oxalis in Mattoon 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 oxalis and expect a good harvest is probably August. Any later than that and your oxalis may not have a chance to fully mature. Starting your oxalis indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Mattoon. It might get as low as -10°F during the coldest months of winter.

Keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Mattoon and it will vary from year to year. Half of the time in Mattoon last frost occurs after April 15 so be sure to be ready to cover your oxalis if you have a late frost.

USDA Zone Info for Mattoon

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 Mattoon

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