Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You can determine when it's possible to plant coral bells in Irvine by using the USDA zone info.

Planting Calendar for Coral Bells

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

Coral Bells are moderately cold tolerant which means that you can start planting them earlier than other plants that might not handle the cold.

The earliest that you can plant coral bells in Irvine 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 coral bells and expect a good harvest is probably October. Any later than that and your coral bells may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your coral bells indoors.

Last Frost Date

The average date of last frost is January 31 in Irvine. It might get as low as 30°F during the coldest months of winter.

Just be sure to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Irvine and it can change quite a bit from year to year. Half of the time in Irvine it frosts late in the year after January 31 so always be ready to cover your coral bells in the event of one of those late frosts.

USDA Zone Info for Irvine

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 Irvine

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