One of the first steps you take when you are determining your gardening schedule is find your 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.

It's possible to estimate when you can plant peonies by referring to the USDA zone info for Corona.

Planting Calendar for Peonies

Frost tolerance for peonies:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Peonies do well in a tiny bit of cold which tells us that you can plant them a bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant peonies in Corona is February. However, you really should wait until March if you don't want to take any chances.

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

Last Frost Date

The average date of last frost is February 15 in Corona. You can expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Corona may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Corona last frost occurs after February 15 so just be sure to be ready to cover your peonies if you have a late frost.

USDA Zone Info for Corona

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 Corona

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