One of the best tools that you have as gardeners to help us determine 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.

In Harrisburg you can figure out when you can plant broccoli by using the USDA zone info.

Planting Calendar for Broccoli

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

Since broccoli are moderately cold tolerant you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant broccoli 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 broccoli and expect a good harvest is probably September. Any later than that and your broccoli may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your broccoli indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Harrisburg. You should expect an average low temperature of 5°F in the coldest months of winter.

Remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Harrisburg and it is different every year. Half of the time in Harrisburg you get surprised by a frost after April 15 so just be sure to be ready to protect your broccoli in the event of a surprise 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.