Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of making a decision about when to plant purple bell vines is to check out the USDA zone info for Gypsum.

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 just a tiny bit earlier in the year because they do ok in moderate cold.

The earliest that you can plant purple bell vines in Gypsum 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 purple bell vines and expect a good harvest is probably August. If you wait 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 April 15 in Gypsum. You can expect an average low temperature of -20°F in the coldest months of winter.

Since the USDA zone info for Gypsum is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Gypsum there is a last frost after April 15 so make sure that you are prepared to protect your purple bell vines if you have a late frost.

USDA Zone Info for Gypsum

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 Gypsum

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