Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of determining when it's possible to plant torenia is to look at the USDA zone info for San Jose.

Planting Calendar for Torenia

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

You really shouldn't plant torenia until after the last frost because they are not cold tolerant.

The earliest that you can plant torenia in San Jose 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 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. Starting your torenia indoors is a great way to get them started a little bit earlier.

Last Frost Date

In San Jose the average date of last frost happens on February 15. In the coldest months of winter you can expect an average low temperature of 25°F.

Since the USDA zone info for San Jose is an average the actual date of last frost is different every year. Since half of the time in San Jose it frosts late in the year after February 15 be ready to cover your torenia in the event of one of those late frosts.

USDA Zone Info for San Jose

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 San Jose

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