Cymbidium Black Leaf Tips: Salt Buildup & Fertilizer Fix

Cause: Excess Salts

Black tips from salts in water + urea-heavy fertilizers. Urea breaks down slowly, accumulates in media, moves to leaf tips, kills tissue.

Monthly double watering: plain water 2 hrs apart, 2x pot volume. 1st loosens salts, 2nd flushes. Add fertilizer to 2nd if desired.
Use nitrate/ammoniacal N fertilizers, not urea-based.
Feed weakly weekly (½–⅓ label rate) instead of strong monthly.
Rainwater ideal; else monthly flush.

Half-day sun OK if not all midday.

Orchids: Cymbidium Leaf Spots: Fungal Diagnosis, Copper Fungicide Treatment & Prevention; Phalaenopsis Leaf Bleaching and Possible Root Rot; Black Leaf Tips and Spots on Cymbidiums: Salt Buildup, Sunburn, or Disease?; Black Stem Discoloration on Phalaenopsis: Fungal Infection from Evening Watering; Cymbidium Leaf Tip Browning: Salt Buildup, Flushing, and Outdoor Transition; Orchid Blooms Rotting: Black Spots, Curling Edges—Hard Water and Fertilizer Issues; Cymbidium Brown Leaf Spots: Fungal Treatment and Prevention; Phalaenopsis Black Leaves in Moss: Fatal Crown Rot; Peace Lily Black Leaves: Soluble Salt Buildup from Bottom Watering; Brown Leaf Tips on Houseplants: Water, Roots, or Drafts?

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