41+ Rosemary Leaves Turning Brown. If it is watered too much or too little, the leaves die and turn brown. Soak the soil thoroughly when you water, and then allow it to dry completely before.
Other signs of overwatering include brown or yellowing patches on the leaves, dying leaf tips and, of course, wet soil.
Season potatoes with salt and pepper. Overwatering is a common cause of brown leaves and leaf drop in rosemary plants overwintering indoors. Cook, turning potatoes occasionally, until tender and water has evaporated, 15 to 20 minutes (check after 15 minutes strip leaves from rosemary sprigs; Please help as i don't want the rose plant to die off.