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.

By looking at the USDA zone info for Corona it's a good idea to determine when you can plant bachelor buttons.

Planting Calendar for Bachelor Buttons

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

Since bachelor buttons do well in moderate cold you can plant them a little earlier in the year than other plants that might not handle the cold.

The earliest that you can plant bachelor buttons 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 bachelor buttons and expect a good harvest is probably October. If you wait any later than that and your bachelor buttons may not have a chance to fully mature. Starting your bachelor buttons indoors is a great way to get them started a couple of weeks 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 is just an average the actual date of last frost is different every year. Half of the time in Corona there is a last frost after February 15 so make sure that you are prepared to cover your bachelor buttons if you have 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.