One of the best tools that you have as gardeners to help us estimate 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.

One way of estimating when it's a good idea to plant heuchera is to look at the USDA zone info for Patterson.

Planting Calendar for Heuchera

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

Heuchera do ok in a little bit of cold which tells us that you can plant them just a bit earlier in the year than more sensitive plants.

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

Last Frost Date

On average the last frost has passed is on February 15 in Patterson. In the coldest months of winter you should expect an average low temperature of 20°F.

Always keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Patterson and it will vary from year to year. Since half of the time in Patterson there is a last frost after February 15 be ready to cover your heuchera in the event of a surprise late frost.

USDA Zone Info for Patterson

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Patterson

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