The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of getting a good idea when you can plant dahlia is to use the USDA zone info for Palmetto.

Planting Calendar for Dahlia

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

Since dahlia are not cold tolerant it is necessary to wait until after the last frost has passed before you can plant them.

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

Last Frost Date

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

Since the USDA zone info for Palmetto is just an average the actual date of last frost will vary from year to year. Since half of the time in Palmetto there is a last frost after February 15 be ready to protect your dahlia if you have a surprise late frost.

USDA Zone Info for Palmetto

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 Palmetto

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