Custom Phalaenopsis Mix: 5:2:1 Fir Bark:Charcoal:Perlite

Ingredient Roles and Particle Size Matter

Fir bark supports roots, charcoal keeps mix open, perlite holds humidity. Annual repotting needed as bark breaks down to fines. Preferred recipe: 5 parts medium fir bark (½–¾”), 2 parts charcoal (similar size), 1 part large perlite (Sponge Roc). Screen all fines. Soak bark to reduce hydrophobicity.