Once fruit has set, cover the plants will bird netting to keep birds from stealing your crop. Mulch with partially decomposed compost after soil has warmed to prevent weeds, keep soil evenly moist, and provide disease protection. In hot climates, plants in pots may need to be watered daily. It is imperative that the trees drain freely. Check for Insects often.
Most blueberries have few problems with insects or diseases.
Ultrafine horticultural oil spray will take care of most insects you do find.