One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Pittsburgh you can figure out when to plant dipladenia by checking out the USDA zone info.

Planting Calendar for Dipladenia

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

Since dipladenia require warm weather you must wait until after the last frost before you can plant them.

The earliest that you can plant dipladenia in Pittsburgh 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 dipladenia and expect a good harvest is probably August. You probably don't want to wait any later than that or else your dipladenia may not have a chance to really do well. You can get started a few weeks earlier by starting your dipladenia indoors.

Last Frost Date

The average date of last frost is April 15 in Pittsburgh. It might get as low as -5°F during the coldest months of winter.

Keep in mind that USDA zone info for Pittsburgh is just an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Pittsburgh there is a last frost after April 15 be ready to cover your dipladenia if you have a late frost.

USDA Zone Info for Pittsburgh

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 Pittsburgh

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