Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. 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 a good idea to plant torenia is to use the USDA zone info for Bullhead City.

Planting Calendar for Torenia

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

Since torenia 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 torenia in Bullhead 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 torenia and expect a good harvest is probably September. Any later than that and your torenia may not have a chance to grow to maturity. If you are starting your torenia indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Bullhead City. It might get as low as 25°F during the coldest months of winter.

Remember that USDA zone info for Bullhead City is an average and the actual date of last frost will vary from year to year. Half of the time in Bullhead City you get surprised by a frost after February 15 so just be sure to be ready to cover your torenia in the event of a surprise late frost.

USDA Zone Info for Bullhead 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 Bullhead City

You may be interested in your other planting guides for Bullhead City.