Chinese Elm Bonsai: White Crystals, Yellowing, Branch Dieback

Chinese Elm (Ulmus parvifolia) since Feb; white crystals on soil/base, branches dying, yellow leaves. Fed correctly, consistent light.

Diagnosis

• White crystals: Mineral salts from hard water/fertilizer buildup.
• Yellowing/dieback: Overwatering, poor drainage, or root rot.
• Stop fertilizing immediately.

Actions

1. Flush soil with rain/distilled water (top water heavily, drain).
2. Check roots: healthy = white/firm; rot = brown/mushy.
3. Repot if root rot (trim dead roots, fresh soil).
4. Use rain/distilled water going forward.
5. Post photos on Learning2Bonsai for pest ID.

Water Quality

Hard water causes salt buildup; elms sensitive. Switch to filtered/rain water.