When can I plant Four O' Clock in Zone 8b

One of the best tools that we have as gardeners to help us estimate our 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 our area.

You can estimate when it's possible to plant four o' clock in Zone 8b by using the USDA zone info.


Planting Calendar for Four O' Clock

Frost tolerance for four o' clock: Not tolerant of frost.
When you should plant them: After the last frost has passed.

Four O' Clock require warm weather which means that you must wait until it warms up after the last frost when the weather gets warmer before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant four o' clock
Possibly ok, but a risky time to plant four o' clock
Probably not a good time to plant four o' clock

The earliest that you can plant four o' clock in Zone 8b 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 and expect a good harvest is probably August. Any later than that and your four o' clock may not have a chance to really do well. Starting your four o' clock 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 March 15 in Zone 8b. We should expect an average low temperature of 15°F in the coldest months of winter.

Since the USDA zone info for Zone 8b is an average our actual date of last frost will vary from year to year. Half of the time in Zone 8b it frosts late in the year after March 15 so always be ready to protect your four o' clock if we have a late frost.

USDA Zone Info for Zone 8b

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)March 15
Average Date of First Frost (fall)November 15
Lowest Expected Low15°F
Highest Expected Low20°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 20°F.

Plants to Grow in Zone 8b

You may be interested in our other planting guides for Zone 8b.