A: Unfortunately, it's tough to give you a definitive answer. The growth pattern of aquatic weeds and algae really depends on where a particular pond or lake is located. Weed growth in a Florida pond, for instance, will be different from weed growth in a Minnesota pond!
In general, however, you can expect to see different pond weeds pop up at different times of the year based on environmental temperature, just like the weeds in your lawn. If your pond or lake freezes over, the perennial weeds will typically die back in the winter and re-emerge in the spring. Some plants, however, will continue to grow throughout the cold season, though at a much slower rate than you'd see in the warmer summer months.
Trouble surfaces when water temperatures drop to the point where your algaecides and herbicides become ineffective – but the weeds continue to grow. Algae Defense, for example, stops working when the water is below 60° Fahrenheit, and the beneficial bacteria in PondClear slow down when temps fall below 50°F.
So what can you do?
When the chemicals and bacteria are no longer working for the winter, it's time to turn to Pond Dye. An effective year-round treatment, Pond Dye shades and beautifies the water regardless of the temperature or time of year.
Pond Dye comes in easy-to-use packets and liquid. To use the packets, simply toss several in the water at various locations around your pond or lake. The packet will dissolve and the dye will disperse throughout the water. To use the liquid, pour the dye in several spots along the pond's edge. There's no mixing required.