Not a good choice for only two hours sun. You need shade loving plants.

It will limp along with barely or just under 6 hours -- i.e. in part sun -- but no way is 2 hours of sun in the shade of maples appropriate habitat for echinacea.

Agreed - too shady.

Razzmatazz is the best in low light for me. Try one in the location. If it starts to look bad, move it. I have a Razzmatazz in part sun location. It gets taller, but it's been there for 4 years.

I consider 2 hours of sun as shade, not not partial shade...

Exactly. 4 or 5 hours? Part-sun. 2 hours? Shade, dude.

I have Echinacea purpurea as well as 'Summer Sky' growing quite robustly in the bird feeding area, which is along the south side of the house. That gets decent sun in the Spring until the huge canopy trees leaf out, then it gets only 2-3 hours of sporadic sun.

This is the 3rd year that these Echinacea plants have been growing there and they are big and have plenty of buds this year (plus they get an earlier start being in a protected location close to the house). As well some of the 'Summer Sky' seedlings that have self-sown will be blooming this year.

I'd like to add something. In lower light my Echinaceas get very tall. They sometimes need to be staked. I have some that are about 4-5 feet tall. The storm last night knocked some over and I had to support them.

That was true with the Summer Sky last year, it wasn't all that tall, but it was pretty floppy. I was thinking of pinching this year, but didn't get around to it.

On the other hand, some of my E. purpurea that grows 4 feet tall in mostly sun gets floppy too.

they didnt do much in the shade for me- dug them up and gave em to my neighbour's sun garden and they took off.

My purple coneflowers get three hours of morning sun. They do just fine-bloom like crazy and no disease problems, but do not spread like they did in full sun even four years after transplanting.

Thanks for confirming my experience Valerie.
Some of the newer hybrids that are other colors definitely need more sun, but as I mentioned above, those with strong purpurea parentage can do fine with 2-3 hours of direct sun a day. Now, if what he was describing above is 0 sun all day and only 2 hours of dappled sun, then that might not be enough.
I enjoy how some like to slot shade vs sun into 3 neat buckets of shade, partial shade and sun because that's what the plant tags have. There is a huge range in there and lots of variability - what bucket does dappled shade all day and no direct sun go into? How thick is the leaf cover causing that dappled shade? What about deep shade all day and 2 hours of direct sun? Different then 4 hours of direct sun?

I had coneflowers grow in a mostly sun spot in my backyard for quite a few years; and then a HHouse was built, and blocked all the natural sunlight into my backyard. I was pretty upset about that, because iithey are my mother's favorite flower. But hold and behold even withwith the sunlight being blocked off, they are still bloominbloomingbloomin ananlike crazy, and looking very healthy. So no, coneflowers in my experience can tolerate bright shade!!

I have an orange coneflower in its 3rd year. It is shaded much of the day by a maple and is doing great.

I used to have my echinacea in dappled sunlight due to a large birch. They were more than fine and it kept the monarda in check.

In the wild echinaceas grow and adapt quite well in the forest. Where I live I've seen them grow and bloom profusely for a very long time at a nature preserve.