One of the best tools that you have as gardeners to help us figure out 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.

A common way of getting a good idea when you can plant turnips is to look at the USDA zone info for Phoenix.

Planting Calendar for Turnips

Frost tolerance for turnips:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

You can not plant turnips until after the last frost because they are not cold tolerant.

The earliest that you can plant turnips in Phoenix is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant turnips and expect a good harvest is probably September. Any later than that and your turnips may not have a chance to really do well. You can get started a couple of weeks earlier by starting your turnips indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Phoenix. You can expect an average low temperature of 25°F in the coldest months of winter.

Just be sure to remember that the actual date of last frost is just an average because it is based on the USDA zone info for Phoenix and it will vary from year to year. Since half of the time in Phoenix last frost occurs after February 15 be ready to protect your turnips in the event of one of those late frosts.

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.