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

A common way of determining when to plant copperleaf is to check out the USDA zone info for Corvallis.

Planting Calendar for Copperleaf

Frost tolerance for copperleaf:	Not tolerant of frost.
When to plant:	After the last frost has passed.

It's probably not a good idea to plant copperleaf until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant copperleaf in Corvallis 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 grow to maturity. You can get started a few weeks earlier by starting your copperleaf indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on March 15 in Corvallis. In the coldest months of winter you can expect an average low temperature of 15°F.

Since the USDA zone info for Corvallis is an average the actual date of last frost will vary from year to year. Since half of the time in Corvallis it frosts late in the year after March 15 be ready to protect your copperleaf if you have one of those late frosts.

USDA Zone Info for Corvallis

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Corvallis

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