Ask-a-Dave's-Gardener: Philodendron selloum stem rot?, 3 by PeaceCrafter

PeaceCrafter wrote:
West central Florida zone 9B Outdoor specimens in north-south breezeway between homes, no watering other than rain, but area between homes tends to flood and hold water easily. The leaves have been yellowing, and when I cut some of them off today I noticed that the core of the stalk is brown and seems rotten. Is this from too much water? Can I just continue to remove the rotting stalks and hope it keeps replacing them? Moving the plant not an option.