Native to tropical parts of the Americas, Peperomia pereskiifolia typically grows in warm, humid settings where roots get steady moisture but still plenty of air. That background explains why peperomia soil should feel organic-rich and lightly moisture-retentive, not dense or soggy.
A loose, loamy substrate with some peat-like softness suits its fine, relatively shallow roots. Good drainage matters because these roots prefer oxygen around them, while the organic content helps hold enough moisture for even growth. Slightly acidic to near-neutral soil is usually the best soil for peperomia.