How Much Perlite to Add to Potting Soil (By Plant Type)
Most indoor plants do well with 20% to 30% perlite mixed into potting soil by volume. Succulents and cacti need more, usually 50% to 60%, since water needs to move through the mix fast instead of lingering around the roots. Aroids like Monstera, Pothos, and Philodendron generally fall between 20% and 35%, enough to open…