One of the best tools that you have as gardeners to help us determine 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.

A way of estimating when you can plant torch lilys is to consult the USDA zone info for Portola Valley.

Planting Calendar for Torch Lilys

Frost tolerance for torch lilys:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since torch lilys are very cold tolerant you can plant them earlier in the year than other plants that might not handle the cold.

The earliest that you can plant torch lilys 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 torch lilys and expect a good harvest is probably October. If you wait any later than that and your torch lilys may not have a chance to fully mature. If you are starting your torch lilys indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on January 31 in Portola Valley. In the coldest months of winter you can expect an average low temperature of 30°F.

Remember that USDA zone info for Portola Valley is just an average and the actual date of last frost is different every year. Since half of the time in Portola Valley last frost occurs after January 31 be ready to cover your torch lilys in the event of a 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.