One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Pasadena should be read to determine when it's the best time to plant coreopsis.

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 tells us that you can plant them a little bit earlier than other frost tender plants.

The earliest that you can plant coreopsis in Pasadena 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 really do well. You can get started a couple of weeks earlier by starting your coreopsis indoors.

Last Frost Date

On average the last frost has passed is on January 31 in Pasadena. It might get as low as 30°F during the coldest months of winter.

Keep in mind that USDA zone info for Pasadena 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 Pasadena it frosts late in the year after January 31 be ready to protect your coreopsis in the event of a surprise late frost.

USDA Zone Info for Pasadena

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 Pasadena

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