One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By referring to the USDA zone info for Middleton it's possible to determine when you can 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 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 vinca vine in Middleton 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. Any later than that and your vinca vine may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your vinca vine indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Middleton. It might get as low as -20°F during the coldest months of winter.

Since the USDA zone info for Middleton is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Middleton you get surprised by a frost after April 15 so make sure that you are ready to protect your vinca vine if you have a late frost.

USDA Zone Info for Middleton

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Middleton

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