One of the first steps you take when you are estimating 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.

By referring to the USDA zone info for Rio Grande City it's a good idea to estimate when it's possible to plant geranium.

Planting Calendar for Geranium

Frost tolerance for geranium:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's probably a bad idea to plant geranium until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant geranium 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 geranium and expect a good harvest is probably September. You probably don't want to wait any later than that or else your geranium may not have a chance to fully mature. You can get started a few weeks earlier by starting your geranium indoors.

Last Frost Date

On average all chance of frost has passed is on February 15 in Rio Grande City. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Rio Grande City may not be accurate from year to year the actual date of last frost will vary from year to year. Since half of the time in Rio Grande City you get a frost after February 15 be ready to protect your geranium in the event of 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.