The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Oak Ridge you can figure out when it's a good idea to plant euphorbia by using the USDA zone info.

Planting Calendar for Euphorbia

Frost tolerance for euphorbia:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since euphorbia do ok in moderate cold you can plant them slightly earlier in the year than other frost tender plants.

The earliest that you can plant euphorbia in Oak Ridge is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant euphorbia and expect a good harvest is probably August. You probably don't want to wait any later than that or else your euphorbia may not have a chance to fully mature. You can get started a few weeks earlier by starting your euphorbia indoors.

Last Frost Date

On average the last frost is on April 15 in Oak Ridge. You can expect an average low temperature of 5°F in the coldest months of winter.

Since the USDA zone info for Oak Ridge is not always accurate the actual date of last frost is different every year. Since half of the time in Oak Ridge you get surprised by a frost after April 15 be ready to cover your euphorbia in the event of a late frost.

USDA Zone Info for Oak Ridge

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Oak Ridge

You may be interested in your other planting guides for Oak Ridge.