The USDA Zone info is a great tool for gardeners to help us estimate 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.

One way of making a decision about when it's the best time to plant creeping phlox is to use the USDA zone info for Corona.

Planting Calendar for Creeping Phlox

Frost tolerance for creeping phlox:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Creeping Phlox tend to make it in quite a bit of cold which tells us that you can plant them earlier in the year than more sensitive plants.

The earliest that you can plant creeping phlox in Corona 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 creeping phlox and expect a good harvest is probably October. If you wait any later than that and your creeping phlox may not have a chance to fully mature. Starting your creeping phlox indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Corona the average date of last frost happens on February 15. In the coldest months of winter you should expect an average low temperature of 25°F.

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 it frosts late in the year after February 15 so just be sure to be ready to protect your creeping phlox in the event of a surprise 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.