I have most of my bee balm in intense sun in zone 5, the Albany area, without problem.None are against a wall but I think yours should be ok. Kareen

Here is a link that might be useful: Our pond and gardens

I agree with Kareen. My bee balm have always been in direct sun and they bloom beautifully!

P.S. I'm in zone 4 near Saratoga.

adkmountaingirl
Wilton NY

I think bee balm's main requirement is planty of water. It likes sun for bloom devolpment. So if you keep it moist it should do well. I would mulch it as well.
Jeanie

I have bee balm in total sunshine and in shade and they all do equally well. It's a great plant!

thank you for your insight.. kareen, beautiful pics!

I have bee balm on the south side of my house, next to the foundation. Loves it. I have more in the front (East), surrounded by the driveway and walkway... loves it. The only place I haven't had luck is along a fence that gets a good deal of sun in the mid-afternoon. A tall, magenta variety nearly died off this winter over there. My mom has it in her (west-facing) backyard. Again, loves it.

full sun, dappled shade, it can take it all.. i love it and even though some think it's invasive, i find it easy to keep in control by just picking the unwanted sprouts in the spring.