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

The best time to plant caladium in Rio Grande City should be figured out by referring to the USDA zone info.

Planting Calendar for Caladium

Frost tolerance for caladium:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably not a good idea to plant caladium until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant caladium 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 caladium and expect a good harvest is probably September. Any later than that and your caladium may not have a chance to grow to maturity. Starting your caladium indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost has passed is on February 15 in Rio Grande City. In the coldest months of winter you can expect an average low temperature of 25°F.

Remember that USDA zone info for Rio Grande City is just an average and the actual date of last frost changes from year to year. Half of the time in Rio Grande City you get a frost after February 15 so be sure to be ready to protect your caladium if you have a late frost.

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.