One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to figure out when it's possible to plant skullcap by reviewing the USDA zone info for Cloverdale.

Planting Calendar for Skullcap

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

Since skullcap require warm weather it is important to wait until after the last frost has passed before you can plant them.

The earliest that you can plant skullcap in Cloverdale 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 skullcap and expect a good harvest is probably September. Any later than that and your skullcap may not have a chance to really do well. You can get started a few weeks earlier by starting your skullcap indoors.

Last Frost Date

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

Always keep in mind that USDA zone info for Cloverdale may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Cloverdale it frosts late in the year after February 15 so just be sure to be ready to protect your skullcap if you have a surprise late frost.

USDA Zone Info for Cloverdale

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 Cloverdale

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