The young small guava plants need evenly moist soil, especially during the flowering period for optimized growth. Reduce the rate during winters and monsoons, as overwatering will invite fungal and other diseases. Once the small guava tree is mature, it does not need watering and can dwell on rainwater only., After receving the plant dont afraid. May be the saplings is little drained because of lack of water & long journey of the packing. Keep the plant in a shady areea and give some water. After one or two days Plant it on your suitable place.