One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to estimate when it's a good idea to plant four o' clock by referring to the USDA zone info for Carrizo Springs.

Planting Calendar for Four O' Clock

Frost tolerance for four o' clock:	Not tolerant of frost.
When to plant:	After the last frost.

Four O' Clock require warm weather which tells us that it is necessary to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant four o' clock in Carrizo Springs is March. However, you really should wait until April 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 September. You probably don't want to wait any later than that or else your four o' clock may not have a chance to really do well. You can get started a little bit earlier by starting your four o' clock indoors.

Last Frost Date

On average the last frost has passed is on February 15 in Carrizo Springs. In the coldest months of winter you should expect an average low temperature of 20°F.

Just be sure to remember that USDA zone info for Carrizo Springs is not always accurate and the actual date of last frost changes from year to year. Since half of the time in Carrizo Springs you get surprised by a frost after February 15 be ready to cover your four o' clock in the event of a late frost.

USDA Zone Info for Carrizo Springs

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Carrizo Springs

You may be interested in your other planting guides for Carrizo Springs.