The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of making a decision about when to plant torenia is to consult the USDA zone info for Norwalk.

Planting Calendar for Torenia

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

Torenia do not do well in cold weather which tells us that it is necessary to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant torenia in Norwalk is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant torenia and expect a good harvest is probably August. Any later than that and your torenia may not have a chance to really do well. If you are starting your torenia 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 April 15 in Norwalk. It might get as low as -15°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Norwalk is just an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Norwalk you get a frost after April 15 be ready to protect your torenia in the event of a late frost.

USDA Zone Info for Norwalk

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Norwalk

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