Before planting it is a good idea to find your USDA Zone info to estimate your garden 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 it's the best time to plant aubretia.

Planting Calendar for Aubretia

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

Aubretia do well in cold which means that you can plant them much earlier than plants that are more sensitive to the cold.

The earliest that you can plant aubretia 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 aubretia and expect a good harvest is probably October. You probably don't want to wait any later than that or else your aubretia may not have a chance to grow to maturity. You can get started a little bit earlier by starting your aubretia indoors.

Last Frost Date

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

Keep in mind that USDA zone info for Sunnyvale is an average and the actual date of last frost changes from year to year. Half of the time in Sunnyvale you get surprised by a frost after February 15 so make sure that you are prepared to protect your aubretia if you have a surprise late frost.

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.