Spring and Summer is a great time to refresh your bark mulch in your Home Owners Association Landscaping Service. Mulching is beneficial for your property but can also cause damage if not installed appropriately. The damaging effects occur when mulch is applied in excessive amounts. Suffocation occurs when the bark is piled around the base of your trees and plants. The effects of excessive mulching cause decay because of the high water retention rate inviting disease and harmful pathogens to enter into the plants bark.