Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Portsmouth should be reviewed to estimate when it's a good idea to plant copperleaf.

Planting Calendar for Copperleaf

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

Copperleaf require warm weather which tells us that it is necessary to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant copperleaf 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 copperleaf and expect a good harvest is probably August. If you wait any later than that and your copperleaf may not have a chance to really do well. You can get started a little bit earlier by starting your copperleaf indoors.

Last Frost Date

On average the last frost has passed is on March 15 in Portsmouth. You should expect an average low temperature of 10°F in the coldest months of winter.

Always keep in mind that USDA zone info for Portsmouth is just an average and the actual date of last frost changes from year to year. Half of the time in Portsmouth you get a frost after March 15 so be sure to be ready to protect your copperleaf in the event of 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.