Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. 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 cauliflower in Mesa should be estimated by using the USDA zone info.

Planting Calendar for Cauliflower

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

Cauliflower can survive in a little bit of cold which tells us that you can plant them a little earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant cauliflower in Mesa 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 cauliflower and expect a good harvest is probably October. You probably don't want to wait any later than that or else your cauliflower may not have a chance to fully mature. You can get started a few weeks earlier by starting your cauliflower indoors.

Last Frost Date

The average date of last frost is February 15 in Mesa. It might get as low as 25°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Mesa is not always accurate and the actual date of last frost is different every year. Half of the time in Mesa you get surprised by a frost after February 15 so make sure that you are prepared to protect your cauliflower in the event of a late frost.

USDA Zone Info for Mesa

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 Mesa

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