I am wondering if there are any plants that would be poison to my fish if I planted them around my pond. They wouldn't be in the pond that way, but could the leaf litter, or blossoms dropping into the water harm my fish? Like daylilies, iris, clematis, sedum, or tiger lilies? ect?
Oak trees are on the list. I have large oak trees. They dump prodigious quantities of leaves and acorns in the ponds. I've never seen a problem arise from it. But I do net the stuff out as soon as possible. However, in the dead of winter some leaves do blow in, settle to the bottom and get trapped under ice where I can't get to them. Come spring I clean up and the fish don't seem to have any problems. So take any list with a grain of salt. I'd be more concerned with foliage in the summer that fish could nibble on.