One of the first steps you take when you are getting a good idea 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.

A common way of making a decision about when it's possible to plant torenia is to examine the USDA zone info for San Marcos.

Planting Calendar for Torenia

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

Torenia are not cold tolerant which tells us that you have to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant torenia in San Marcos is February. However, you really should wait until March if you don't want to take any chances.

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

Last Frost Date

In San Marcos the average date of last frost happens on January 31. It might get as low as 30°F during the coldest months of winter.

Since the USDA zone info for San Marcos is an average the actual date of last frost will vary from year to year. Half of the time in San Marcos you get surprised by a frost after January 31 so make sure that you are prepared to cover your torenia if you have one of those late frosts.

USDA Zone Info for San Marcos

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in San Marcos

You may be interested in your other planting guides for San Marcos.