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.

It's a good idea to determine when it's the best time to plant chrysanthemum by referring to the USDA zone info for Del Rio.

Planting Calendar for Chrysanthemum

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

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

The earliest that you can plant chrysanthemum in Del Rio 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. You probably don't want to wait any later than that or else your chrysanthemum may not have a chance to fully mature. If you are starting your chrysanthemum indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost has passed is on February 15 in Del Rio. It might get as low as 20°F during the coldest months of winter.

Since the USDA zone info for Del Rio is just an average the actual date of last frost changes from year to year. Half of the time in Del Rio there is a last frost after February 15 so make sure that you are prepared to cover your chrysanthemum if you have a surprise late frost.

USDA Zone Info for Del Rio

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Del Rio

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