Cavity treatment and wound care for significant trees in Baltimore MD — filling structural cavities to prevent water accumulation and further decay propagation, cleaning and treating large pruning wounds to support compartmentalization — represents the more involved end of tree health care that arborists provide for especially valuable specimens. These interventions do not reverse existing decay but can slow its progression and maintain structural integrity longer than letting the condition advance without professional attention. Licensed arborists serving Baltimore City and Baltimore County who offer these more intensive tree health care services provide options for property owners committed to preserving specific trees that would otherwise become removal candidates.