Phalaenopsis in Sphagnum Moss: Black Root Spots, Crown Darkening

Cheryl's grocery-store Phalaenopsis (clear plastic pot inside terra cotta) in sphagnum moss developed black spots on roots, black rings at root joints, lower crown turning black. Treated with Fung-onil; 4 blooms dropped. Roots still green/white but yellowing tips with black spots.

Sphagnum Moss Is the Problem

Moss compacts, restricts air flow, holds water unevenly → root suffocation and crown rot. Black spots on roots may be harmless mold from excess moisture, but crown darkening is serious.

Post-Bloom Repotting (Do Not Wait)

1. Repot to standard fir-bark orchid mix (soaked).
2. Unpot, rinse roots, discard mushy/stringy roots.
3. Pot in well-drained plastic pot.
4. Leave old spike—some Phals rebloom on green spikes; if it dies, remove later.

Why Not Sphagnum?

In pots, moss behaves like a sponge—top dries, bottom rots. Bark mix provides consistent aeration and drainage.