The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By checking out the USDA zone info for Ridgefield Park you should be able to determine when it's possible to plant four-o-clock flower.

Planting Calendar for Four-o-clock flower

Frost tolerance for four-o-clock flower:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since four-o-clock flower are not cold tolerant it is necessary to wait until after the last frost before you can plant them.

The earliest that you can plant four-o-clock flower in Ridgefield 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 four-o-clock flower and expect a good harvest is probably August. If you wait any later than that and your four-o-clock flower may not have a chance to really do well. Starting your four-o-clock flower indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Ridgefield Park. In the coldest months of winter you can expect an average low temperature of 0°F.

Remember that USDA zone info for Ridgefield Park is just an average and the actual date of last frost changes from year to year. Since half of the time in Ridgefield Park you get a frost after April 15 be ready to cover your four-o-clock flower if you have one of those late frosts.

USDA Zone Info for Ridgefield 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 Ridgefield Park

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