Late Summer – The late Summer application contains a Nature Safe organic fertilizer to work organic matter into your soil where it needs it most. This application also provides broadleaf weed control on an as needed basis. A & A Lawn Care provides a 6 application program to control and prevent weeds from appearing in your lawn. During heavy rain, London’s sewage storm pipes overflow into the River Thames, sending dissolved oxygen levels plummeting and threatening the species it supports. One commonly used tool to reduce the severity of these lake management problems is to eliminate or lessen thermal stratification through thatch rake.