What potting mix actually works for Monstera, Philodendron and Anthurium?

Aroid roots evolved on bark and leaf litter, clinging to trees with air moving around them. Standard bagged potting compost is the opposite environment: fine, dense and slow to drain. The goal of a so-called chunky mix is to hold moisture on particle surfaces while keeping large air gaps between them.

A mix that works reliably across Monstera, Philodendron, Anthurium and Epipremnum is roughly 40 per cent orchid-grade pine bark, 25 per cent coarse perlite or pumice, 20 per cent coco coir or peat, 10 per cent worm castings and 5 per cent horticultural charcoal. Proportions by volume, not weight, and mixed dry before you add anything.

Each component does a specific job. Bark is the structural skeleton and creates the air gaps. Perlite or pumice keeps drainage fast — pumice is heavier and does not float to the surface, which matters for tall plants that need ballast. Coir holds the water; too much and you are back to a dense mix, too little and you will be watering daily. Worm castings supply slow, mild nutrition and useful microbes. Charcoal is optional but helps buffer the mix as bark breaks down.

Adjust for conditions rather than following the recipe blindly. A dry, heated flat wants more coir; a humid room or a heavy-handed waterer wants more bark and perlite. Anthurium and other true epiphytes tolerate the barkiest end of the range; Philodendron hederaceum and Epipremnum are happy in something closer to conventional compost.

Bark decomposes. Expect to repot every eighteen to twenty-four months — when the mix looks like soil again, it has stopped doing its job and will start holding water the way you were trying to avoid.