The USDA Zone info is a great tool for gardeners to help us estimate 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.

One way of determining when to plant copperleaf is to consult the USDA zone info for Walnut.

Planting Calendar for Copperleaf

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

Since copperleaf do not do well in cold weather it is important to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant copperleaf in Walnut is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant copperleaf and expect a good harvest is probably September. Any later than that and your copperleaf may not have a chance to fully mature. You can get started a few weeks earlier by starting your copperleaf indoors.

Last Frost Date

The average date of last frost is January 31 in Walnut. You can expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for Walnut is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Walnut last frost occurs after January 31 so just be sure to be ready to protect your copperleaf if you have one of those late frosts.

USDA Zone Info for Walnut

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°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 35°F.

Plants to Grow in Walnut

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