The best fertilizer for philodendron plants is a standard soluble houseplant fertilizer, according to Colorado State University's PlantTalk. Apply the fertilizer according to the specific product's guidelines, as nutritional potency varies by manufacturer.
About this Author
Josh Duvauchelle is an editor and journalist with more than 10 years' experience. His work has appeared in various magazines, including "Honolulu Magazine," which has more paid subscribers than any other magazine in Hawaii. He graduated with honors from Trinity Western University, holding a Bachelor of Arts in professional communications, and earned a certificate in applied leadership and public affairs from the Laurentian Leadership Centre.