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.

By reviewing the USDA zone info for Sunnyvale it's possible to estimate when you can plant achimenes.

Planting Calendar for Achimenes

Frost tolerance for achimenes:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's probably not a good idea to plant achimenes until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant achimenes in Sunnyvale is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant achimenes and expect a good harvest is probably September. You probably don't want to wait any later than that or else your achimenes may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your achimenes indoors.

Last Frost Date

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

Always keep in mind that USDA zone info for Sunnyvale may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Since half of the time in Sunnyvale you get a frost after February 15 be ready to cover your achimenes in the event of a 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.