Nepenthes Water Tolerance: 100–200 ppm for Most, Lower for Ultra-Highlanders

No Universal PPM Limit—Species Dependent

• Lowlanders: Tolerate 100–200 ppm dissolved solids.
• Highlanders: Prefer <50 ppm.
• Ultra-highlanders: Need near-pure water.

Key Practice: Always water heavily so excess drains completely—prevents mineral accumulation.

Early Warning Sign: Reduced Pitcher Production

If pitchers become fewer/smaller despite good light, mineral buildup is likely. Repot into fresh soil and switch to pure water until pitchers return (may take months).