Andi you keep Peonies in pots?! I didn't know you could do that!
Harrison's Yellow is very disease resistant but a once bloomer.
I've pretty much shovel pruned all my roses that get a lot of BS.
I don't mind if they get it late in the season but won't tolerate it early in the season.
That's why I grow a lot of Rugosas. Pretty much disease free roses with no spraying.
