One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of making a decision about when to plant sweet woodruff is to look at the USDA zone info for Oak Ridge.

Planting Calendar for Sweet Woodruff

Frost tolerance for sweet woodruff:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since sweet woodruff do well in moderate cold you can plant them just a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant sweet woodruff in Oak Ridge 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 sweet woodruff and expect a good harvest is probably September. If you wait any later than that and your sweet woodruff may not have a chance to fully mature. You can get started a little bit earlier by starting your sweet woodruff indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Oak Ridge. It might get as low as 5°F during the coldest months of winter.

Just be sure to remember that the actual date of last frost is an average because it is based on the USDA zone info for Oak Ridge and it changes from year to year. Half of the time in Oak Ridge you get surprised by a frost after April 15 so make sure that you are ready to cover your sweet woodruff 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.