Iba Hormone Rooting on pothos
What's Happening
Synthetic auxins like Indole-3-butyric acid (IBA) accelerate root initiation by mimicking natural indole-3-acetic acid (IAA) hormones. IBA at 0.25-0.8 mg/L concentration triggers earlier cambium cell division and increases root primordia formation by 40-60% compared to untreated cuttings. The hormone is absorbed through the cut surface and transported to meristematic tissue where it stimulates DNA replication and cell division. Unlike natural IAA which breaks down rapidly, IBA remains active for 7-14 days, providing sustained hormonal signaling during the critical root initiation window.
How to Fix It
- 1
Take 4-6 inch cuttings with clean, sharp scissors sterilized with alcohol
- 2
Apply rooting hormone powder containing IBA (0.25-0.8 mg/L equivalent) to the cut end
- 3
Alternatively, use liquid rooting hormone by dipping cutting for 5-10 seconds
- 4
Allow treated cutting to callus for 30-60 minutes before placing in water (reduces hormone wash-off)
- 5
Place in water and change every 3-5 days as standard protocol
- 6
Expect root initials 3-7 days earlier than untreated cuttings
- 7
Do not over-apply—excess hormone can cause tissue damage and inhibit rooting
How to Prevent It
Take cuttings from healthy, vigorous parent plants with high natural auxin levels. Apply hormone within 30 minutes of cutting to maximize absorption before the wound calluses over.
Related Problems
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