One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first chance to plant mecardonia in Philadelphia should be figured out by using the USDA zone info.

Planting Calendar for Mecardonia

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

It's probably a bad idea to plant mecardonia until after all chance of frost has passed because they do not do well in cold weather.

The earliest that you can plant mecardonia 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 mecardonia and expect a good harvest is probably August. If you wait any later than that and your mecardonia may not have a chance to fully mature. You can get started a few weeks earlier by starting your mecardonia indoors.

Last Frost Date

The average date of last frost is March 15 in Philadelphia. It might get as low as 10°F during the coldest months of winter.

Since the USDA zone info for Philadelphia is just an average 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 March 15 be ready to cover your mecardonia if you have a late frost.

USDA Zone Info for Philadelphia

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Philadelphia

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