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.

By looking at the USDA zone info for Healdsburg it's a good idea to figure out when it's a good idea to plant sweet woodruff.

Planting Calendar for Sweet Woodruff

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

Sweet Woodruff do ok in moderate cold which tells us that 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 Healdsburg is January. However, you really should wait until February 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 October. You probably don't want to wait any later than that or else 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

The average date of last frost is February 15 in Healdsburg. In the coldest months of winter you should expect an average low temperature of 25°F.

It's important to remember that USDA zone info for Healdsburg is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Healdsburg you get a frost after February 15 so make sure that you are prepared to cover your sweet woodruff in the event of a surprise late frost.

USDA Zone Info for Healdsburg

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Healdsburg

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