Perlite vs. Sand in Carnivorous Plant Mixes: Consistency and Fertilizer Contamination

A grower using Canadian peat and washed horticultural sand asked why Sarracenia Northwest often recommends perlite over sand.

Jeff Dallas explained: historically, perlite was more consistent. Sand varied—calcareous in the Midwest, often dirty. Good silica sand is fine. However, most retail perlite now contains fertilizer (a near-monopoly by big soil producers). Independent garden centers may carry fertilizer-free amendments. Always check labels.