One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first chance to plant chrysanthemum in Rio Grande City should be determined by looking at the USDA zone info.

Planting Calendar for Chrysanthemum

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

Since chrysanthemum are not cold tolerant you have to wait until after the last frost before you can plant them.

The earliest that you can plant chrysanthemum 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 chrysanthemum and expect a good harvest is probably September. If you wait any later than that and your chrysanthemum may not have a chance to grow to maturity. If you are starting your chrysanthemum indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

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

Just be sure to remember that the actual date of last frost is just an average because it is based on the USDA zone info for Rio Grande City and it changes from year to year. Since half of the time in Rio Grande City you get surprised by a frost after February 15 be ready to cover your chrysanthemum 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.