One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant evolvulus in Rio Grande City can be determined by checking out the USDA zone info.

Planting Calendar for Evolvulus

Frost tolerance for evolvulus:	Not tolerant of frost.
When to plant:	After the last frost.

It's not a good idea to plant evolvulus until after the last frost because they do not do well in cold weather.

The earliest that you can plant evolvulus in Rio Grande City 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 evolvulus and expect a good harvest is probably September. Any later than that and your evolvulus may not have a chance to really do well. You can get started a little bit earlier by starting your evolvulus indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Rio Grande City. You should expect an average low temperature of 25°F in the coldest months of winter.

It's important to remember that USDA zone info for Rio Grande City is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Rio Grande City you get surprised by a frost after February 15 so be sure to be ready to cover your evolvulus in the event of one of those late frosts.

USDA Zone Info for Rio Grande City

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Rio Grande City

You may be interested in your other planting guides for Rio Grande City.