Soil Mixes for Fluoride-Sensitive Plants: Perlite Alternatives

Perlite Substitutes

Perlite adds fluoride. For sensitive plants (Maranta, Calathea, Spider Plant, Dracaena), use:

• Vermiculite – holds more water, less aeration.
• Styrofoam beads – lightweight, inert.
• Fine bark chips – orchid bark, screened.

African Violet Soil for Marantaceae

Yes, AV mix (peat, vermiculite, perlite) works for Prayer Plants (Maranta) and Calatheas. But ensure it has no added fertilizer.

Keeping Salts Low

• Use filtered/distilled/rain water.
• Choose soilless mixes without pre-added fertilizer.
• Fertilize at half strength, only during active growth.
• Avoid soil-based mixes (higher mineral content).

Your knowledge is excellent—these practices will prevent tip burn.