Diagnosing Problems in a Mature Jade Plant: Mold, Yellow Leaves, and Leaf Drop

What "Moldy and Yellow" Could Mean

• Mealybugs: White, cottony masses at leaf joints—often mistaken for mold.
• Overwatering: Yellow, mushy leaves that drop.
• Sunburn: Brown/white patches on leaves facing the window.
• Root rot: Gradual decline, often after repotting.

Information Needed for a Real Diagnosis

Please provide:

• A photo showing the whole plant and pot.
• Your location (climate zone).
• How long it's been outside and what changed 6 months ago.
• Watering routine and soil type.

Basic Jade Care

• Full sun (south/west window).
• Water only when soil is dry halfway down the pot.
• Fast-draining cactus/succulent mix.
• No fertilizer in winter.

With details, I can pinpoint the issue and give a targeted rescue plan.