Phalaenopsis Aerial Roots and Keikis: What They Are and How to Manage Them

Abundant aerial roots and a keiki (baby plant) on an old flower spike are signs of a healthy, mature Phalaenopsis. Here's how to manage both during repotting.

Aerial Roots: Normal, Not Propagatable

• Natural for epiphytes—seek humidity and light
• Cannot grow into new plants (no meristematic tissue)
• Function: absorb atmospheric moisture, photosynthesize
• Management: Guide into new pot at repotting if flexible; otherwise leave aerial

Keiki (Baby Plant) on Old Spike

Readiness for removal:

• 3+ leaves (3+ inches long)
• Multiple roots >2 inches with green tips
• Active root growth visible

Removal and potting:

1. Twist gently to separate from spike; cut if resistant
2. Pot in 2-3 inch container with fine bark
3. High humidity (bag/dome) for 2-3 weeks
4. Bright shade, warm (70-80°F)

Repotting the Mother Plant

1. Timing: After flowering (standard practice)
2. Soak fresh bark; unpot, rinse roots
3. Remove mushy roots only
4. Use slightly larger pot if incorporating aerial roots
5. Soak aerial roots 30 min before repotting (increases flexibility)
6. Rotate plant slowly into pot to guide roots downward

Old Spike Management

After keiki removal: cut spike just above next lower node. May rebloom or produce another keiki. If brown, remove at base.

Annual repotting in fresh bark is the single best practice for Phalaenopsis longevity. Your plant's vigor shows you're doing many things right!