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.

It's possible to figure out when you can plant dahlias by using the USDA zone info for Catasauqua.

Planting Calendar for Dahlias

Frost tolerance for dahlias:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Dahlias require warm weather which tells us that it is necessary to wait until it warms up after the last frost before you can plant them.

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

The last month that you can plant dahlias and expect a good harvest is probably August. If you wait any later than that and your dahlias may not have a chance to grow to maturity. Starting your dahlias indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on April 15 in Catasauqua. It might get as low as -5°F during the coldest months of winter.

Keep in mind that USDA zone info for Catasauqua is not always accurate and the actual date of last frost changes from year to year. Half of the time in Catasauqua you get surprised by a frost after April 15 so always be ready to cover your dahlias if you have one of those late frosts.

USDA Zone Info for Catasauqua

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Catasauqua

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