Oncidium With Rotten Roots: Rescue in Plastic Box Setup

Lisa's first orchid (Oncidium), 2 weeks old, in SW window, 75°F, 50-60% humidity. Came in peat moss with shriveled pseudobulbs, 4 flower spikes. Leaves yellowing. Repotted: cut flowers, removed rotten roots to 2", rooting hormone, in clear plastic box on moist sphagnum, partially bagged, misting leaves.

Not Your Fault

Rot developed before purchase (takes month+). Nursery likely watered like houseplants.

Adjustments

• SW window: Too bright unless sheer curtains or far north. Check leaf color: light-medium green = good
• Misting: Morning only; never after mid-afternoon
• Air movement: Essential; crack window if possible
• Pot drainage: Add 1" rocks in bottom (only 1 hole)
• Repot when: New roots visible

Good instinct cutting flowers to save plant.