The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. 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 trachelium in Presidio should be figured out by looking at the USDA zone info.

Planting Calendar for Trachelium

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

Since trachelium are not cold tolerant it's important to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant trachelium in Presidio 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 trachelium and expect a good harvest is probably September. You probably don't want to wait any later than that or else your trachelium may not have a chance to fully mature. Starting your trachelium indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Presidio. You should expect an average low temperature of 20°F in the coldest months of winter.

Since the USDA zone info for Presidio is not always accurate the actual date of last frost changes from year to year. Since half of the time in Presidio it frosts late in the year after February 15 be ready to protect your trachelium in the event of one of those late frosts.

USDA Zone Info for Presidio

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 Presidio

You may be interested in your other planting guides for Presidio.