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

By reviewing the USDA zone info for Sunnyvale it's a good idea to estimate when you can plant chinese chives.

Planting Calendar for Chinese chives

Frost tolerance for chinese chives:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant chinese chives a little earlier in the year because they do well in moderate cold.

The earliest that you can plant chinese chives in Sunnyvale 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 chinese chives and expect a good harvest is probably October. Any later than that and your chinese chives may not have a chance to fully mature. You can get started a few weeks earlier by starting your chinese chives indoors.

Last Frost Date

The average date of last frost is February 15 in Sunnyvale. In the coldest months of winter you should expect an average low temperature of 25°F.

Since the USDA zone info for Sunnyvale may not be accurate from year to year the actual date of last frost changes from year to year. Since half of the time in Sunnyvale you get surprised by a frost after February 15 be ready to protect your chinese chives in the event of one of those late frosts.

USDA Zone Info for Sunnyvale

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 Sunnyvale

You may be interested in your other planting guides for Sunnyvale.