One of the first steps you take when you are getting a good idea your gardening schedule is find your 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.

The first opportunity to plant sweet potato vine in Zone 3b should be estimated by checking out the USDA zone info.

Planting Calendar for Sweet Potato Vine

Frost tolerance for sweet potato vine:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since sweet potato vine require warm weather it is important to wait until after the last frost has passed before you can plant them.

The earliest that you can plant sweet potato vine in Zone 3b is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant sweet potato vine and expect a good harvest is probably August. Any later than that and your sweet potato vine may not have a chance to grow to maturity. You can get started a little bit earlier by starting your sweet potato vine indoors.

Last Frost Date

In Zone 3b the average date of last frost happens on May 15. It might get as low as -35°F during the coldest months of winter.

Remember that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Zone 3b and it is different every year. Since half of the time in Zone 3b you get surprised by a frost after May 15 be ready to protect your sweet potato vine if you have a late frost.

USDA Zone Info for Zone 3b

Here is the info for USDA Zone 3b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-35°F
Highest Expected Low	-30°F

This means that on a really cold year, the coldest it will get is -35°F. On most years you should be prepared to experience lows near -30°F.

Plants to Grow in Zone 3b

You may be interested in your other planting guides for Zone 3b.