The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Phoenix can be reviewed to estimate when to plant coleus.

Planting Calendar for Coleus

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

You should not plant coleus until after the last frost because they do not do well in cold weather.

The earliest that you can plant coleus 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 coleus and expect a good harvest is probably September. You probably don't want to wait any later than that or else your coleus may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your coleus indoors.

Last Frost Date

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

Since the USDA zone info for Phoenix may not be accurate from year to year 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 protect your coleus 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.