Before planting it is a good idea to find your USDA Zone info to determine 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.

You can determine when to plant morning glory in Philadelphia by referring to the USDA zone info.

Planting Calendar for Morning Glory

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

Morning Glory are not cold tolerant which tells us that you have to wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant morning glory in Philadelphia 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 morning glory and expect a good harvest is probably August. If you wait any later than that and your morning glory may not have a chance to really do well. You can get started a few weeks earlier by starting your morning glory indoors.

Last Frost Date

On average the last frost is on April 15 in Philadelphia. In the coldest months of winter you can expect an average low temperature of 0°F.

Just be sure to remember that USDA zone info for Philadelphia is an average and the actual date of last frost will vary from year to year. Since half of the time in Philadelphia it frosts late in the year after April 15 be ready to protect your morning glory if you have a surprise late frost.

USDA Zone Info for Philadelphia

Here is the info for USDA Zone 7a.

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

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

Plants to Grow in Philadelphia

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