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

The earliest that you can plant purple bell vines in Bozeman can be determined by checking out 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.

You can plant purple bell vines a bit earlier in the year because they are barely cold tolerant.

The earliest that you can plant purple bell vines in Bozeman 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 purple bell vines and expect a good harvest is probably August. Any later than that and your purple bell vines may not have a chance to really do well. 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 May 15 in Bozeman. In the coldest months of winter you should expect an average low temperature of -25°F.

Remember that USDA zone info for Bozeman may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Bozeman there is a last frost after May 15 so make sure that you are prepared to protect your purple bell vines in the event of a surprise late frost.

USDA Zone Info for Bozeman

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Bozeman

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