When to Plant Torenia in Decatur, IL

One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's a good idea to figure out when it's possible to plant torenia by referring to the USDA zone info for Decatur.


Planting Calendar for Torenia

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

Since torenia require warm weather you must wait until after the last frost before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant torenia
Possibly ok, but a risky time to plant torenia
Probably not a good time to plant torenia

The earliest that you can plant torenia in Decatur 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. If you wait 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 few weeks earlier.

Last Frost Date

In Decatur the average date of last frost happens on April 15. In the coldest months of winter you should expect an average low temperature of -15°F.

Since the USDA zone info for Decatur may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since half of the time in Decatur last frost occurs after April 15 be ready to protect your torenia if you have one of those late frosts.

USDA Zone Info for Decatur

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 Decatur

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