The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The earliest that you can plant centaurea in Alameda should be estimated by using the USDA zone info.

Planting Calendar for Centaurea

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

Since centaurea are moderately cold tolerant you can plant them just a bit earlier in the year than more sensitive plants.

The earliest that you can plant centaurea 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 centaurea and expect a good harvest is probably October. Any later than that and your centaurea may not have a chance to really do well. You can get started a little bit earlier by starting your centaurea indoors.

Last Frost Date

The average date of last frost is January 31 in Alameda. You can expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for Alameda is an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Alameda there is a last frost after January 31 be ready to cover your centaurea if you have one of those late frosts.

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.