One of the best tools that you have as gardeners to help us determine your gardening schedule is the 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.

The earliest that you can plant chinese celery in Phoenix should be determined by reviewing the USDA zone info.

Planting Calendar for Chinese celery

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

Chinese celery are one of those plants that can tolerate a tiny bit of cold weather which tells us that you can plant them slightly earlier than other frost tender plants.

The earliest that you can plant chinese celery in Phoenix 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 chinese celery and expect a good harvest is probably September. You probably don't want to wait any later than that or else your chinese celery may not have a chance to really do well. Starting your chinese celery indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is February 15 in Phoenix. In the coldest months of winter you should expect an average low temperature of 25°F.

It's important to remember that USDA zone info for Phoenix is not always accurate and the actual date of last frost is different every year. Half of the time in Phoenix it frosts late in the year after February 15 so always be ready to cover your chinese celery if you have a late frost.

USDA Zone Info for Phoenix

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 Phoenix

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