As a shade-intolerant plant that requires nutrient rich soil, phragmites often proliferates in places that were historically freshwater forested wetlands (and adjacent to tidal estuaries influenced by freshwater flows). It often grows in once we have removed the canopy cover and bring infill. Once this plant takes over, it chokes out native flora and ecological succession from wet meadow to forest effectively ceases.
Here, we removed a stand of phrag by hand and replaced it with plants including bayberry, red cedar, red maple, and beach plum. Although follow-up visits are likely necessary, the additional plants should grow and fill in the space left by the phrag, and help to reduce its prevalence long term.
*Heads up*, phrag often grows in areas regulated by federal, state, and local law, so you often need a permit to remove it yourself.