Phalaenopsis Spike Dieback with Sticky Drops: Potting Mix Is the Culprit

Diagnosis: Your "Orchid Soil" Mix Is Suffocating Roots

Sticky clear drops (plant sap) on spikes, then dieback starting 1" below tip? Repotting into non-bark "soil" mix caused root zone waterlogging. Fine particles trap water, exclude air → root pressure builds → sap weeps from spike pores → nutrients leak → spike starves and dies back.

The Science

• Orchids need OPEN, AIRY mix (fir bark creates air spaces).
• Your mix likely has fine particles → waterlogged root zone.
• Fir bark MUST be soaked 1+ hours before use (dry bark repels water).

Emergency Repotting (Even in Spike)

Normally avoid repotting in spike, but your plant is already losing spikes to root failure.

1. Unpot, rinse roots thoroughly.
2. Cut mushy/rotted roots.
3. Repot in soaked fir-bark orchid mix.
4. Plastic pot with abundant drainage.
5. Water weekly, let drain completely.

Spike Management

• Cut dying portions below dieback, above a node.
• Focus energy on root/leaf regrowth, not flowering.
• Once roots recover, new spikes will emerge.

Your kitchen windowsill location is fine. Fix the root zone, and this orchid will thrive again.