One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Ironwood should be reviewed to estimate when to plant vinca vine.

Planting Calendar for Vinca Vine

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

Since vinca vine are moderately cold tolerant you can plant them a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant vinca vine in Ironwood is March. However, you really should wait until April 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 August. Any later than that and your vinca vine may not have a chance to fully mature. Starting your vinca vine indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Ironwood. You should expect an average low temperature of -30°F in the coldest months of winter.

Since the USDA zone info for Ironwood is not always accurate the actual date of last frost changes from year to year. Since half of the time in Ironwood you get a frost after May 15 be ready to protect your vinca vine if you have one of those late frosts.

USDA Zone Info for Ironwood

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Ironwood

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