One of the first steps you take when you are estimating your gardening schedule is find your 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.

The best time to plant sanvitalia in Portola Valley should be determined by using the USDA zone info.

Planting Calendar for Sanvitalia

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

Sanvitalia tend to make it in very little cold which means that you can plant them just a tiny bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant sanvitalia in Portola Valley 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 sanvitalia and expect a good harvest is probably September. You probably don't want to wait any later than that or else your sanvitalia may not have a chance to really do well. You can get started a couple of weeks earlier by starting your sanvitalia 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.

Remember that the actual date of last frost is an average because it is based on the USDA zone info for Portola Valley and it changes from year to year. Half of the time in Portola Valley there is a last frost after January 31 so always be ready to protect your sanvitalia if you have a surprise late frost.

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.