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.

You will be able to determine when to plant torenia by looking at the USDA zone info for Manhattan.

Planting Calendar for Torenia

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

Since torenia are not cold tolerant it is important to wait until after the last frost has passed before you can plant them.

The earliest that you can plant torenia in Manhattan 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 grow to maturity. You can get started a few weeks earlier by starting your torenia indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Manhattan. It might get as low as -15°F during the coldest months of winter.

Remember that USDA zone info for Manhattan is an average and the actual date of last frost changes from year to year. Since half of the time in Manhattan you get surprised by a frost after April 15 be ready to protect your torenia if you have a surprise late frost.

USDA Zone Info for Manhattan

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 Manhattan

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