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 USDA zone info for Patterson can be looked at to determine when it's a good idea 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 can survive in some cold which tells us that you can plant them a little earlier in the year than other plants that might not handle the cold.

The earliest that you can plant coreopsis in Patterson 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. If you wait any later than that and your coreopsis may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your coreopsis indoors.

Last Frost Date

The average date of last frost is February 15 in Patterson. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Patterson is an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Patterson it frosts late in the year after February 15 be ready to cover your coreopsis if you have a late frost.

USDA Zone Info for Patterson

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 Patterson

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