The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In San Ramon you can determine when it's the best time to plant tritoma by checking out the USDA zone info.

Planting Calendar for Tritoma

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

Since tritoma are very cold tolerant you can plant them earlier in the year than more sensitive plants.

The earliest that you can plant tritoma in San Ramon 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 tritoma and expect a good harvest is probably October. If you wait any later than that and your tritoma may not have a chance to really do well. Starting your tritoma indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on February 15 in San Ramon. You should expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for San Ramon is not always accurate the actual date of last frost will vary from year to year. Since half of the time in San Ramon you get surprised by a frost after February 15 be ready to cover your tritoma in the event of a surprise late frost.

USDA Zone Info for San Ramon

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 San Ramon

You may be interested in your other planting guides for San Ramon.