One of the best tools that you have as gardeners to help us estimate your gardening schedule is the 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.

It's a good idea to determine when to plant chard by using the USDA zone info for Harrisburg.

Planting Calendar for Chard

Frost tolerance for chard:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Chard do ok in mild cold which tells us that you can plant them a little earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant chard in Harrisburg is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant chard and expect a good harvest is probably September. You probably don't want to wait any later than that or else your chard may not have a chance to fully mature. You can get started a few weeks earlier by starting your chard indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Harrisburg. It might get as low as 5°F during the coldest months of winter.

Always keep in mind that USDA zone info for Harrisburg is just an average and the actual date of last frost will vary from year to year. Since half of the time in Harrisburg last frost occurs after April 15 be ready to cover your chard in the event of a late frost.

USDA Zone Info for Harrisburg

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°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 10°F.

Plants to Grow in Harrisburg

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