The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. 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 evolvulus in Portsmouth can be figured out by looking at the USDA zone info.

Planting Calendar for Evolvulus

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

You really shouldn't plant evolvulus until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant evolvulus in Portsmouth 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 evolvulus and expect a good harvest is probably August. Any later than that and your evolvulus may not have a chance to fully mature. Starting your evolvulus indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is March 15 in Portsmouth. In the coldest months of winter you can expect an average low temperature of 10°F.

Since the USDA zone info for Portsmouth is an average the actual date of last frost will vary from year to year. Half of the time in Portsmouth there is a last frost after March 15 so be sure to be ready to cover your evolvulus if you have a late frost.

USDA Zone Info for Portsmouth

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Portsmouth

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