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

It's possible to estimate when it's the best time to plant four-o-clock flower by looking at the USDA zone info for Lewisburg.

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.

Since four-o-clock flower require warm weather you really should wait until after the last frost has passed before you can plant them.

The earliest that you can plant four-o-clock flower in Lewisburg 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 grow to maturity. You can get started a couple of weeks earlier by starting your four-o-clock flower indoors.

Last Frost Date

The average date of last frost is April 15 in Lewisburg. In the coldest months of winter you should expect an average low temperature of -5°F.

Since the USDA zone info for Lewisburg is just an average the actual date of last frost changes from year to year. Half of the time in Lewisburg last frost occurs after April 15 so make sure that you are prepared to protect your four-o-clock flower in the event of a surprise late frost.

USDA Zone Info for Lewisburg

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°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 0°F.

Plants to Grow in Lewisburg

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