Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Romeoville you can determine when it's the best time to plant melampodium by looking at the USDA zone info.

Planting Calendar for Melampodium

Frost tolerance for melampodium:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably a bad idea to plant melampodium until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant melampodium in Romeoville 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 melampodium and expect a good harvest is probably August. If you wait any later than that and your melampodium may not have a chance to really do well. Starting your melampodium indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Romeoville. It might get as low as -15°F during the coldest months of winter.

Since the USDA zone info for Romeoville is not always accurate the actual date of last frost changes from year to year. Since half of the time in Romeoville there is a last frost after April 15 be ready to protect your melampodium in the event of one of those late frosts.

USDA Zone Info for Romeoville

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 Romeoville

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