Landscape maintenance includes watering, fertilizing, mulching, pest control, mowing, edging, winterization and pruning plants. Watering should be done frequently when plants are first planted to prevent wilting, then less as plants are established. Fertilizer should be mixed in at planting and added to established plants as needed. Mulch should be replenished as it decays. Pest control prevents damage from insects, diseases and weeds. Pruning improves plant health, appearance and controls size/shape, with timing depending on plant type. A variety of tools are used for different pruning tasks.