When to Plant Plectranthus in Granite City, IL

The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's a good idea to determine when you can plant plectranthus by referring to the USDA zone info for Granite City.


Planting Calendar for Plectranthus

Frost tolerance for plectranthus: Not tolerant of frost.
When to plant: After the last frost has passed.

Plectranthus require warm weather which tells us that you need to wait until it warms up after all chance of frost has passed before you can plant them.

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

The earliest that you can plant plectranthus in Granite City 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 plectranthus and expect a good harvest is probably August. You probably don't want to wait any later than that or else your plectranthus may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your plectranthus indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Granite City. You can expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Granite City may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Granite City it frosts late in the year after April 15 so just be sure to be ready to cover your plectranthus if you have a surprise late frost.

USDA Zone Info for Granite City

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-5°F
Highest Expected Low0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Granite City

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