The answer to 'mulching disease' is that mulch can sometimes lead to fungal diseases in plants if not properly managed. Common symptoms include discolored or wilting leaves, rotting stems, and stunted growth. The main causes are overwatering, poor air circulation, and using contaminated or old mulch.
To prevent and treat mulching diseases, start by ensuring proper drainage and air flow around plants. Avoid piling mulch too thick (no more than 2-3 inches) and keep it a few inches away from plant stems. Replace old, decomposed mulch annually and consider using disease-resistant mulch types like cedar or pine bark. If you notice signs of disease, act quickly to remove affected plant parts and improve growing conditions. For severe or persistent issues, it's best to consult a professional landscaper or arborist.