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.

One way of getting a good idea when to plant four-o-clock flower is to consult the USDA zone info for Kewanee.

Planting Calendar for Four-o-clock flower

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

It's probably a bad idea to plant four-o-clock flower until after the last frost when the weather gets warmer because they do not do well in cold weather.

The earliest that you can plant four-o-clock flower in Kewanee 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 fully mature. You can get started a few weeks earlier by starting your four-o-clock flower indoors.

Last Frost Date

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

Remember that USDA zone info for Kewanee may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Since half of the time in Kewanee last frost occurs after April 15 be ready to protect your four-o-clock flower in the event of a late frost.

USDA Zone Info for Kewanee

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Kewanee

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