The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. 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 oregano in Rio Grande City should be determined by using the USDA zone info.

Planting Calendar for Oregano

Frost tolerance for oregano:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since oregano are one of those plants that can tolerate a little bit of cold weather you can plant them a little bit earlier in the year than other frost tender plants.

The earliest that you can plant oregano in Rio Grande City is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant oregano and expect a good harvest is probably October. Any later than that and your oregano may not have a chance to really do well. You can get started a couple of weeks earlier by starting your oregano indoors.

Last Frost Date

The average date of last frost is February 15 in Rio Grande City. It might get as low as 25°F during the coldest months of winter.

Remember that USDA zone info for Rio Grande City is just an average and the actual date of last frost is different every year. Half of the time in Rio Grande City last frost occurs after February 15 so make sure that you are prepared to cover your oregano in the event of a surprise 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.