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 Pittsburgh should be read to figure out when you can plant squash.

Planting Calendar for Squash

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

It's not a good idea to plant squash until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant squash 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 squash and expect a good harvest is probably August. You probably don't want to wait any later than that or else your squash may not have a chance to fully mature. If you are starting your squash indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

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

Since the USDA zone info for Pittsburgh is not always accurate the actual date of last frost changes from year to year. Half of the time in Pittsburgh you get a frost after April 15 so just be sure to be ready to protect your squash in the event of 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.