Mine is in partial sun and does just fine. It took it four years to get established and then POW it is a bloom machine. It is also smothering neighboring plants. I plan to cage it next year. I could flop down over a bank nicely.

It does not matter if sun is on feet or not, what the old adage means is that they need moist soil. They do not tolerate drought. You do not need to place them where their root zone is in the shade.

I am in z3/4 and this is my 2nd full summer with PF. It has swallowed one of those smallish wrought iron obelisks and smothered it with twisted blue blooms and silky seedheads. Truthfully, it is as pretty to me covered with the frilly ripening seedheads as it was covered in blue flowers.
Mine is planted in full sun all day (then again, we have not had a warm summer here this year!) I love either idea you mention with this plant. If it is a low retaining wall, the spilling over look might be really nice. As mine is massed aroudn this short obelisk, I can;t tell a lot aobut the stems. I am wondering if they are more thick and brittle, or flexible.... Hmmmm. If the stems are lsee flxible, the chair otpion might be the way to go. I will check mine tomorrow.

Jennie, Thanks for sharing your PF experience. How tall is the obelisk you are using? Interested to hear if your stems are brittle or flexible.
Marlene

Hi,

My Petit Faucon stems are definitely brittle. It grows between a leucoethoe and an itea and is glorious. It's one of my three nominees for best all-summer performance. (The other two are Harlow Carr and Sizaia Ptitsa -- which gives me a lot of violet, but I'm not complaining.)