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High mortality reduces gains from Northampton’s spring tree plantings, staff report
Summary
City staff and volunteers planted 72 trees this spring but reported unusually high post‑planting deaths tied to weather, nursery stock quality and site conditions; replacements are planned for fall.
Spring plantings in Northampton produced 72 new trees this season but city staff reported an unusually high number of post‑planting deaths and said replacement plantings will be required in the fall.
Jen, a staff member who coordinated spring plantings, told the Northampton Urban Forestry Commission that “we planted a total of 72 trees. 32 of those were bare roots, and the other 40 were grow bag or ball of burlaps.” She added the city “did have, interestingly, probably the highest number of tree deaths that I've known since we've been planting.”
The commission and staff described several likely contributors to the losses: a difficult winter and spring with alternating frozen ground and warm spells; a prolonged dry period late last summer and fall that left soils dry; strong winds during weather shifts; and nursery stock that lacked fibrous root systems. The staff report named London plane trees, bald cypress and several containerized Zelkova as species with higher-than-expected mortality this season.
Commission members and staff said they are responding with monitoring, supplemental watering and plans to replant sites this fall. Jen described ongoing maintenance: “Brooke has been out there once a week” watering new plantings, and staff are compiling lists of failed trees for replacement.
Commissioners also discussed planting methods and stock types. Staff and volunteers said grow‑bag stock has generally produced the best root‑to‑shoot ratios and higher survival in recent seasons, while some ball‑and‑burlap and container stock arrived with limited fibrous roots. The commission discussed nursery root‑pruning practices that can improve post‑transplant survival but noted those techniques must be applied in advance by the grower.
The spring round included several larger neighborhood plantings: a 14‑tree replacement on Ridgeview Road to replace ash trees lost to emerald ash borer; 28 bare‑root trees planted at the JFK site with the Rotary Club; 19 trees planted on Hubbard Avenue (half the street); and a small cul‑de‑sac project that added three large oaks plus understory species. Volunteers and groups including a local high‑school environmental science club participated in Saturday and Sunday plantings.
Commissioners emphasized the program’s goal of replacing trees that fail and keeping plantings at a scale the city can maintain. Jen said she logged more than 100 hours between February and June on planting coordination and volunteer work. The city budget that took effect July 1 maintained the prior year’s planting funding, the commission said, and staff expect to resume fall plantings and replacements when the nursery and site conditions allow.
The commission directed staff to reconcile the spring planting inventory and mortality list and to deliver that reconciled data to commissioners for planning and budget tracking.
Less critical details: staff noted tulip trees at one site leafed out late but are being monitored; several sites will be rechecked for staking and mulch; and volunteers will be asked to help with fall watering and replacements if needed.
