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

One way of estimating when you can plant four-o-clock flower is to consult the USDA zone info for Angola.

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.

It's a bad idea to plant four-o-clock flower until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant four-o-clock flower in Angola 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. You probably don't want to wait any later than that or else your four-o-clock flower may not have a chance to really do well. You can get started a little bit earlier by starting your four-o-clock flower indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Angola. In the coldest months of winter you should expect an average low temperature of -15°F.

Since the USDA zone info for Angola is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Angola you get surprised by a frost after April 15 be ready to cover your four-o-clock flower if you have a late frost.

USDA Zone Info for Angola

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 Angola

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