The USDA Zone info is a great tool for gardeners to help us determine 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.

The USDA zone info for Portola Valley can be used to determine when it's a good idea to plant cigar plant.

Planting Calendar for Cigar Plant

Frost tolerance for cigar plant:	Not tolerant of frost.
When to plant:	After the last frost.

It's not a good idea to plant cigar plant until after the last frost because they do not do well in cold weather.

The earliest that you can plant cigar plant 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 cigar plant and expect a good harvest is probably September. You probably don't want to wait any later than that or else your cigar plant may not have a chance to grow to maturity. Starting your cigar plant indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Portola Valley the average date of last frost happens on January 31. It might get as low as 30°F during the coldest months of winter.

Since the USDA zone info for Portola Valley is an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Portola Valley you get a frost after January 31 be ready to protect your cigar plant if you have 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.