I have head that there are desirable and undesirable cultivars of arrowhead. I have wild arrowhead all around my pond, and it is spreading. Can someone please look at the attached pictures and tell me if this is a plant I want to control, or just let it spread and proliferate.
In my experience your specie of arrowhead(AH), there are several species, is a better plant than your cattails. The AH will not grow as deep, will spread, but not spread is fast, will not grow as tall, and will not create as much dead muck fodder as the cattails. Both provide some small fish and invertebrate habitat. The AH and cattails will stabilize the shoreline and both consume nutrients tending to compete with the filamentous algae. Keep both managed and under control with some glysophate product such as ShoreKlear-Plus sprayed now in late summer.
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