Philodendron Yellow Leaves Brown Spots. Low humidity and dry soil cause leaves to droop and brown on their edges later followed by entire yellowing. If there is a way to reduce the plant s sun exposure in its current location such as creating shade pursue that.
Take a close look at the container and your watering regimen. Check for sunken spots or dead areas showing rings of growth advanced virus bacteria fungus. This is caused by bacteria and fungus that are introduced to your plant from the outside world.
The most common cause of brown yellow or black spots on a philodendron is leaf spot disease.
You can treat leaf spot disease if you catch it early. Brown patches on the leaves of your philodendrons are an indicator of too much sun exposure. This is caused by bacteria and fungus that are introduced to your plant from the outside world. Check for sunken spots or dead areas showing rings of growth advanced virus bacteria fungus.