Mushy, Smelly Orchid Leaf: Bacterial Rot from Bad Watering Practices

Diagnosis: Bacterial Infection from Waterlogged Roots

Mushy leaf with bad odor? Bacterial rot. Your watering (soaking wet every 2–4 weeks) in degraded mix = root rot → leaf infection.

Immediate Steps

1. Cut off mushy leaf (good call).
2. Seal cut with sulfur fungicide powder.
3. STOP watering until repotted—dry conditions slow infection.

Essential Repotting (Anytime for Phalaenopsis)

• Fresh orchid mix (fir bark based).
• Plastic pot with many drainage holes.
• Unpot, rinse roots, cut mushy/dead ones.
• Repot with healthy roots only.
• Water weekly after repotting—mix will drain properly now.

Why Your Old Method Failed

Even with drainage holes, decomposed mix holds water too long. Orchids need instant drainage + air flow, not periodic soaking.

Send a photo if unsure of ID, but this sounds like Phalaenopsis. Fix the root zone, and the problem won't recur.