Most of the time plants die due to over care. Its not summer but over watering. If your plant shows below symptoms it means it's dying due to over care. 1) Sudden yellowing of leaves 2) Blackening of stems 3) Leaves shedding, 4) Damp soil. If you see any of the above symptoms stop watering the plan and... See more keep it in the shaded area till the soil dries, then start giving water not more then 3 times a week. The other reason for plant death are insects and fungus, keep your plant well-groomed with neem oil and other organic disinfectants, you can put some wood charcoal in your pots as well.