Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's possible to estimate when to plant chives by reviewing the USDA zone info for San Ramon.

Planting Calendar for Chives

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

Chives are one of those plants that can tolerate quite a bit of cold weather which tells us that you can plant them a quite a bit earlier than plants that are more sensitive to the cold.

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

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in San Ramon. It might get as low as 25°F during the coldest months of winter.

It's important to remember that USDA zone info for San Ramon is just an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in San Ramon there is a last frost after February 15 be ready to cover your chives in the event of a 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.