One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By checking out the USDA zone info for Corona it's possible to estimate when it's the best time to plant roses.

Planting Calendar for Roses

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

You can plant roses a bit earlier in the year because they do well in moderate cold.

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

Last Frost Date

On average all chance of frost has passed is on February 15 in Corona. In the coldest months of winter you should expect an average low temperature of 25°F.

Always keep in mind that USDA zone info for Corona is just an average and the actual date of last frost is different every year. Since half of the time in Corona you get a frost after February 15 be ready to cover your roses if you have one of those late frosts.

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.