Native to southern Mexico, Anthurium clarinervium comes from warm tropical forest conditions where roots get steady moisture, airflow, and plenty of decaying organic matter. That background explains why it prefers a loose, organic-rich substrate that stays lightly moist without becoming dense or stagnant.
The best soil for Anthurium clarinervium is airy and moisture-retentive at the same time. Its roots benefit from oxygen around them, so the texture should feel open and crumbly rather than compact. A slightly acidic, loamy to peaty substrate supports steady hydration while still draining well.