I have 3 xanadu philodendron that have turned yellow and have stunted growth. On each side of them, I have healthy xanadu philodendron. They are all on the same sprinkler system. What should I do to make all of them healthy?
Certified GKH Gardening Expert
Is it possible that the yellowed plants are receiving more or less water from the sprinkler than the healthy ones? Overwatering and underwatering can both cause yellow leaves and poor plant health.
Another possibility is an insect infestation that is spreading from plant to plant. Check carefully for insects and damage symptoms.