Bred from tropical aroid ancestry native to Central and South America, Philodendron 'Prince of Orange' is adapted to warm, humid conditions where roots stay lightly moist but still receive air. That background explains why dense, slow-drying soil is not a good match.
The best soil for Philodendron is loose, organic-rich, and moisture-retentive without becoming heavy. A loamy, peaty texture suits its fine roots because it holds steady moisture and nutrients while still draining well. Slightly acidic to near-neutral soil also supports healthy root function and steady growth.