Burning Bush that takes forever to change colour

The problem is likely that it needs more sun- can you set up in a place that gets more direct sunlight?

Gee, I've never, ever heard of that before, Cathy! I also live in southern Ontario and in our last house, had a Burning Bush that faced south/west; it received sun from about 12:30 p.m. to sunset. We also probably have the same (clay) soil. After a few years (of living in our newly-built house and could afford it!), we hired professional landscapers to do a project, therefore, our B.B. shrub was planted by them. I don't know if there are different "species" of this shrub or whether there is any trick to preparing the soil, etc. but I highly doubt it as they are so common in subdivisions. I wish I could help you as mine was beautiful every Fall. Have you asked at an established nursery?

I have asked, thank you ... they thought it maybe not mature yet but after 8 or 9 years, it should be by now. I'm going to try miracle grow. The only thing I have around it is black cedar chips but that shouldn't hurt the soil? I just love the look of them and it is a big disappointment when it doesn't change when you want it to....

Black cedar chips will absorb heat and light, try putting down something light colored that reflects the heat & light. A tree and shrub fertilizer will work best and should be used after the soil reaches 40F and maintains that temperature. If it does not respond, consider replanting it, as the roots may need to be spread out more.

Thanks, I'll give it a shot!