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.

By using the USDA zone info for Mattoon it's a good idea to figure out when you can plant romanesco.

Planting Calendar for Romanesco

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

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

The earliest that you can plant romanesco in Mattoon 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 romanesco and expect a good harvest is probably September. If you wait any later than that and your romanesco may not have a chance to fully mature. You can get started a little bit earlier by starting your romanesco indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Mattoon. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Mattoon may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Mattoon there is a last frost after April 15 so just be sure to be ready to protect your romanesco in the event of a surprise 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.