Protective bags having bag bodies formed by or with meshed fabrics can be used to protect potted plants from plant bugs. The protective bags are sized and shaped to protect both the plant top section and the plant root system or just the plant root system. Accessible seams or windows can be provided to access the interior of a bag for watering, feeding plant food, and/or pruning purposes. The protective bags can be sized and shaped to work with potted plants using soils or hydroponic systems.