A new and distinct Philodendron cultivar named ‘PHM1’ is disclosed, characterized by deeply lobed, glossy, dark green foliage and a distinctive outwardly growing, semi-horizontal habit. Plants grow rapidly and produce an abundance of foliage. Plant habit is well suited for 8 to 12 inch commercial pots. The new variety is a Philodendron, normally produced as an indoor ornamental container plant.
