I generally keep my fenceline clear by trimming up from between my shed and the fence. But buddleias can grow really quickly, and this one has clearly loved the hot summer as it has suddenly shot up and over the fence. I've missed the opportunity to keep it in check on my side. It is now leaning on the shed. There's nearly 2ft between shed and fence, to give you an idea of the buddleia's size. If I trimmed up from the fence now, I would probably take out most of the flower heads.
I'm torn. I want to protect my shed, but I don't want to spoil the neighbour's view of a plant they love.
If I wait until it has finished flowering, and then cut it back to the fence, will I ruin the plant? As importantly, well this give it the opportunity to send up stems between the fence and the shed?