Sunburned Phalaenopsis: Leaf Damage and Repotting

Phalaenopsis Sunburn: Damaged Leaf and Recovery

Ella (new to orchids) had two donated Phalaenopsis. All well until one placed on floor near balcony door; sun moved, directly hit leaf—sunburned. Moved it, but decline over ~2 weeks. Burned leaf horrid color (dark brown/yellow), tiny white dots at end, thin dark edge, floppy. Adjacent leaf slightly burned. Six other healthy leaves, some new growth. Cut stem tip turning orange/yellow—cut whole stem? Photo attached.

Expert Response

Ella, overheated leaf will soon fall off. Damage on other leaf permanent but limited. Remove old flower spike. Unrelated to sun damage, consider repotting in fresh orchid mix if not done. Assess roots (mushy removed, healthy firm/green when wet). New mix with fir bark, soaked before use. Repotting gives fresh start for new roots and leaves. Several healthy leaves = good prognosis.

Follow-Up: Pot Type and Spike Cutting

Ella hasn't repotted. Asks: must use clear plastic pot? Has terracotta with holes—okay? How far down to cut old flower spike?

Second Response

Ella, clear plastic not required but advantages: roots photosynthetic (chlorophyll), light through walls; can monitor root growth deep in mix. Cut old spike just above node (joint). Depending on parentage, spike may naturally brown and die—then remove entire spike. If green, cutting above node may produce branch with buds/flowers.