Top 5 Tips for Tree Trimming on Long Island

Time Your Trimming Strategically

Long Island’s climate demands careful timing for tree trimming. Winter dormancy (late November through February) is ideal for most deciduous trees, allowing for better visibility of the branch structure and minimal stress on the tree. For flowering trees like dogwoods and magnolias, wait until after their spring bloom cycle to avoid losing next year’s flowers. Avoid trimming oaks during their growing season (April–October) to prevent oak wilt disease, which is present in parts of Long Island.

Know Long Island’s Local Regulations

Before cutting a single branch, check your municipality’s tree ordinances. Many Long Island towns and villages require permits for removing or extensively pruning trees, especially those of certain sizes or species. Nassau and Suffolk counties have different regulations, with coastal areas often having stricter rules to protect trees that prevent erosion. For example, you can visit the Nassau County official website for comprehensive information on local tree ordinances. Contact your local building department or environmental conservation office before beginning significant work.

Adapt Techniques for Local Species

Long Island’s tree population includes distinctive native species that require specific approaches. When trimming native oaks, use minimal pruning techniques and avoid removing more than 20% of the canopy in a single year. For native maples, which are prone to “bleeding” sap, winter pruning is essential. Pine trees common in the sandy soils of the South Shore should only have dead branches removed, as pines rarely require structural pruning and can be damaged by excessive cutting. For more detailed guidance on proper pruning techniques, check out the resources available at the International Society of Arboriculture.

Account for Long Island’s Weather Patterns

Trim with an eye toward Long Island’s coastal winds and storm patterns. Remove crossing branches and thin crowns to reduce wind resistance, particularly for trees near the shoreline where nor’easters and hurricane remnants can cause significant damage. Create a balanced canopy that won’t become lopsided and vulnerable during the island’s frequent winter storms. Pay special attention to trees damaged by previous storms like Superstorm Sandy.

Mind the Underground Utilities

Long Island’s dense infrastructure means careful attention to what lies beneath your trees. Before significant pruning work that might require heavy equipment, contact Long Island utilities to mark underground lines. The high water table in many parts of the island also means root systems can be shallower than expected, so be cautious about soil compaction from equipment. For trees near power lines, always consult with PSEG Long Island or a certified arborist, as improper cutting near electrical lines is extremely dangerous.

Remember that major trimming work on large trees is best left to certified professionals who understand Long Island’s unique conditions and can safely manage the job. For additional tree care tips and seasonal guidelines, you might also explore the advice provided by the Arbor Day Foundation.