The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. 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 determine when it's the best time to plant mustard greens by referring to the USDA zone info for Oak Forest.

Planting Calendar for Mustard greens

Frost tolerance for mustard greens:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since mustard greens do well in moderate cold you can plant them a little bit earlier in the year than more sensitive plants.

The earliest that you can plant mustard greens in Oak Forest is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant mustard greens and expect a good harvest is probably September. If you wait any later than that and your mustard greens may not have a chance to really do well. You can get started a couple of weeks earlier by starting your mustard greens indoors.

Last Frost Date

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

Since the USDA zone info for Oak Forest is an average the actual date of last frost changes from year to year. Half of the time in Oak Forest there is a last frost after April 15 so be sure to be ready to protect your mustard greens in the event of a late frost.

USDA Zone Info for Oak Forest

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 Oak Forest

You may be interested in your other planting guides for Oak Forest.