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.

In Signal Hill you can figure out when it's the best time to plant doronicum by looking at the USDA zone info.

Planting Calendar for Doronicum

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

You can plant doronicum a bit earlier in the year because they are moderately cold tolerant.

The earliest that you can plant doronicum in Signal Hill 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 doronicum and expect a good harvest is probably October. You probably don't want to wait any later than that or else your doronicum may not have a chance to fully mature. Starting your doronicum indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost has passed is on January 31 in Signal Hill. In the coldest months of winter you should expect an average low temperature of 35°F.

Since the USDA zone info for Signal Hill is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Signal Hill you get a frost after January 31 so be sure to be ready to cover your doronicum in the event of one of those late frosts.

USDA Zone Info for Signal Hill

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in Signal Hill

You may be interested in your other planting guides for Signal Hill.