One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of estimating when it's a good idea to plant coreopsis is to refer to the USDA zone info for Alameda.

Planting Calendar for Coreopsis

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

Coreopsis are moderately cold tolerant which means that you can plant them earlier than other frost tender plants.

The earliest that you can plant coreopsis in Alameda 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 coreopsis and expect a good harvest is probably October. Any later than that and your coreopsis may not have a chance to grow to maturity. You can get started a little bit earlier by starting your coreopsis indoors.

Last Frost Date

On average the last frost has passed is on January 31 in Alameda. You can expect an average low temperature of 30°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Alameda is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Alameda last frost occurs after January 31 so be sure to be ready to protect your coreopsis in the event of a late frost.

USDA Zone Info for Alameda

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Alameda

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