Spring is the season of plant activity as they emerge from winter dormancy. Weeds in the pond also start to emerge in the early month after a few months hidden away. This is the best time to start your pond weeds control.
A pond well-stocked with aquatic plants seems to fare better than a bare pond insofar as weed infestation is concerned. This is probably because of the lower light intensity and lowering of nutrients in the water which seems to deter some weeds. There are basically two types of pond weeds. Those that float on the water, and those who spend their entire pond life submerged below the surface. Controlling all pondweed is essential in the early stages.
Is an algae which uses nitrogen and light present in the water with which to survive. As its name suggests, Blanket Weed quickly forms a dense mat of growth that can soon choke a pond and its inhabitants.
Duckweed - rather attractive in small doses - is normally found on still water ponds, floating on the surface. The small clusters of leaves - bright apple green - soon multiply, and in spite of being a good source of food to some fish, will soon become a nuisance.
It has many benefits - not least being a good hiding place for small fish as they hatch. For the floating duck weed sends down stream of small roots which are great hiding places. Once it takes hold, it deprives the pond of light, so young emerging plants soon weaken. A 50 - 50 solution, is to weekly scoop out the quickly growing weed with a fishing net. The few bits you miss will soon develop and spread, so this really is a weekly operation.