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.

You can figure out when you can plant purple bell vines in Zone 1b by using the USDA zone info.

Planting Calendar for Purple Bell Vines

Frost tolerance for purple bell vines:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Purple Bell Vines are barely cold tolerant which means that you can get them planted just a bit earlier than more sensitive plants.

The earliest that you can plant purple bell vines in Zone 1b is June. However, you really should wait until July if you don't want to take any chances.

The last month that you can plant purple bell vines and expect a good harvest is probably July. Any later than that and your purple bell vines may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your purple bell vines indoors.

Last Frost Date

The average date of last frost is June 15 in Zone 1b. You can expect an average low temperature of -55°F in the coldest months of winter.

Since the USDA zone info for Zone 1b is not always accurate the actual date of last frost changes from year to year. Since half of the time in Zone 1b you get surprised by a frost after June 15 be ready to cover your purple bell vines if you have one of those late frosts.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)	June 15
Average Date of First Frost (fall)	July 15
Lowest Expected Low	-55°F
Highest Expected Low	-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in your other planting guides for Zone 1b.