The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to figure out when it's the best time to plant vinca vine by checking out the USDA zone info for Romeoville.

Planting Calendar for Vinca Vine

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

Vinca Vine are moderately cold tolerant which tells us that you can plant them a little bit earlier than other plants that might not handle the cold.

The earliest that you can plant vinca vine in Romeoville 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 vinca vine and expect a good harvest is probably September. You probably don't want to wait any later than that or else your vinca vine may not have a chance to grow to maturity. You can get started a little bit earlier by starting your vinca vine indoors.

Last Frost Date

The average date of last frost is April 15 in Romeoville. In the coldest months of winter you should expect an average low temperature of -15°F.

Always keep in mind that USDA zone info for Romeoville may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Romeoville there is a last frost after April 15 so make sure that you are prepared to cover your vinca vine in the event of a surprise late frost.

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.