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 first opportunity to plant tagetes in Phoenix can be determined by reviewing the USDA zone info.

Planting Calendar for Tagetes

Frost tolerance for tagetes:	Not tolerant of frost.
When to plant:	After the last frost has passed.

You can not plant tagetes until after the last frost has passed because they do not do well in cold weather.

The earliest that you can plant tagetes 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 tagetes and expect a good harvest is probably September. You probably don't want to wait any later than that or else your tagetes may not have a chance to grow to maturity. If you are starting your tagetes indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost is on February 15 in Phoenix. In the coldest months of winter you can expect an average low temperature of 25°F.

Keep in mind that USDA zone info for Phoenix is just an average and the actual date of last frost changes from year to year. Since half of the time in Phoenix there is a last frost after February 15 be ready to cover your tagetes 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.