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

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

Planting Calendar for Zinnia

Frost tolerance for zinnia:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

You really shouldn't plant zinnia until after the last frost when the weather gets warmer because they are not cold tolerant.

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

Last Frost Date

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

Keep in mind that USDA zone info for Prospect Park may not be accurate from year to year and the actual date of last frost changes from year to year. Half of the time in Prospect Park you get surprised by a frost after April 15 so make sure that you are prepared to protect your zinnia if you have a late frost.

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.