In New Jersey pond installations, or the Mid-Atlantic and New England area, there is not a bad time of year to install a pond because it is a permanent installation. At FSA&L pond construction happens as long as we can break ground. FSA&L pond installations can go into December and pond construction in New Jersey starts again in late February. Many people think that a backyard pond installation must be during the spring time, although a popular time, it is not the only time to install a pond in New Jersey. All new pond construction will need about an eight week period after installation to truly become biologically active, meaning; they can start to break down some of the nutrients that build up in the water on their own through natural processes. There is a bad time to introduce pond fish and aquatic plants and that is November thru March. The recommended pond fish and aquatic plant season is April thru October.