Hi,

I'm in the Western Suburbs of Chicago, here's what my nursery's catalog says about it. It's a new selection for them, so I'm not sure I could get first hand info from them.

Brilliant red-orange blazes from the blooms of this cultivar from "The Flower Fields"

Full Sun to Part Shade
Moisture Req: Moist, well drained
Blooms Orange all season
Grows 6"-12" H by 12"-18" wide; trailing
Attracts Hummingbirds
Flower Fields Selection

I grew 'Terra Cotta' and blue Calibrachea in the Eastern Panhandle of West Virginia and they did very well. They were planted in large containers (with other annuals and grasses) and in full sun until mid-afternoon. The high temps in that area generally were in the low to mid-90's with fairly high humidity during the summer. I'm thinking that's similar to your Illinois summers and, with perhaps some shade from hot afternoon sun, they should do well for you.

I am now living in south central Kansas and am trying 'Calli Orange' in containers. We had unusually cool weather for the first 3 weeks after I planted them so they haven't grown much. Our summers here are hotter (many 100+ degree days) so I've placed them in locations that will receive only a couple hours of morning sun. We'll see what happens.