One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of figuring out when it's possible to plant common hollyhock is to check out the USDA zone info for Prospect Park.

Planting Calendar for Common hollyhock

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

Common hollyhock are one of those plants that can tolerate a little bit of cold weather which tells us that you can start planting them earlier than other plants that might not handle the cold.

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

Last Frost Date

On average the last frost is on April 15 in Prospect Park. It might get as low as 0°F during the coldest months of winter.

Since the USDA zone info for Prospect Park is an average the actual date of last frost changes from year to year. Since half of the time in Prospect Park there is a last frost after April 15 be ready to cover your common hollyhock if you have one of those late frosts.

USDA Zone Info for Prospect Park

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 Prospect Park

You may be interested in your other planting guides for Prospect Park.