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.

You should be able to estimate when it's a good idea to plant feverfew by looking at the USDA zone info for Portola Valley.

Planting Calendar for Feverfew

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

You can plant feverfew just a bit earlier in the year because they do well in moderate cold.

The earliest that you can plant feverfew in Portola Valley 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 feverfew and expect a good harvest is probably October. If you wait any later than that and your feverfew may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your feverfew indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in Portola Valley. It might get as low as 30°F during the coldest months of winter.

Keep in mind that USDA zone info for Portola Valley 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 Portola Valley last frost occurs after January 31 so be sure to be ready to protect your feverfew in the event of one of those late frosts.

USDA Zone Info for Portola Valley

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Portola Valley

You may be interested in your other planting guides for Portola Valley.