Roebellini Palm (Phoenix roebelenii) Frond Dieback: Water or Spider Mites

3–4 ft Roebellini in 22″ pot, NW window, watering every 2 weeks, some fronds dry/brittle. Two likely causes:

1. Watering Issue (Pot Size Suspect)

• If previous pot was much smaller, 22″ holds excess wet soil → root rot → frond death.
• If correctly potted, every 2 weeks may be too dry → same symptoms.

2. Spider Mites (Common on Phoenix Palms)

• Check for fine webbing on fronds (mist lightly to reveal).
• Stippling, bronzing, dry tips.
• Treat with insecticidal soap/neem oil weekly ×3 if found.

Actions

1. Check soil moisture at bottom (probe/chopstick). Adjust frequency.
2. Inspect for mites thoroughly.
3. NW window light is fine—don't move for light.
4. If sun is too strong (unlikely NW), consider Yucca, Jade, or Cactus for that spot.

Correct watering + mite control = recovery.