Throwing away pots? Isn't that some kind of gardening blasphemy?
I have some bb in pots and most in the ground. I bought it as clumping but this is its third year in the ground and it is showing signs of being invasive. I live on a rock cliff with no soil so I thought it would stay put. Wrong! It has been easy to dig up with having only an inch or two of soil to spread out into. Unless you want to get back at your neighbor for their soil erosion I recommend not planting it anywhere near your fence line. It would be something you would need to keep a close eye on. I think I remember reading somewhere that there is no such thing as a clumping black. Just a marketing gimmick.
It sure is loving this rain.