Choosing the Right Sand for Carnivorous Plant Soil Mixes

A German grower asks whether “play sand” (fine beach sand) or coarser “aquarium sand” (0.7–2 mm) is intended by “sand” in English-language CP guides. Aquarium sand resists compaction better.

Grade and Composition Matter

Medium grades (~1 mm) are ideal; 2 mm is coarse. More critical is mineralogy: use silica or other non-calcareous rock. Avoid limestone- or coral-based sands (alkaline). Clean, heavy white sand is usually silica. Check for silica warnings on the bag. Rock products are regional; research local sources.