One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to determine when you can plant evolvulus by using the USDA zone info for Grand Forks.

Planting Calendar for Evolvulus

Frost tolerance for evolvulus:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since evolvulus require warm weather you must wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant evolvulus in Grand Forks 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 evolvulus and expect a good harvest is probably August. If you wait any later than that and your evolvulus may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your evolvulus indoors.

Last Frost Date

The average date of last frost is May 15 in Grand Forks. You can expect an average low temperature of -30°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Grand Forks may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Grand Forks last frost occurs after May 15 so be sure to be ready to cover your evolvulus in the event of one of those late frosts.

USDA Zone Info for Grand Forks

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Grand Forks

You may be interested in your other planting guides for Grand Forks.