Mandevilla (Sun Parasol) Yellowing: Transplant Shock vs. Cultural Issues

Cindy's two mandevillas (same pots, soil, light) — one yellowed and dropped most leaves.

Common Causes Table

• Brown tips: salt buildup, dry soil, low humidity → leach, increase humidity.
• Yellow leaves: overwatering, poor drainage, excess light, lime in soil/water → reduce water, aerate soil, filtered water, acidic mix.
• Leaf drop: over/underwatering, light/temp shock, mealybugs, spider mites, scale → adjust water, remove drafts, improve light, treat pests.

Likely Culprit

One plant suffering more transplant shock. Diagnose further; if pests found, treat accordingly.

Side-by-side comparison reveals individual plant variability.