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Commission reviews tree-care tools: tree diapers, water bags and maintenance guidance
Summary
Commissioners discussed tree diapers (hydrogel water bags), including manufacturer guidance that the bags can function about three years if intact and that depleted gel and mulch-soil mixes can be composted; members asked about heat absorption and color options and the chair said she will share manufacturer Q&A information.
The commission discussed the function and lifecycle of tree "diapers" (hydrogel water bags) used on recent plantings. The chair told members the manufacturer recommends about three years of service if the water bag is undamaged and explained that when the hydrogel is depleted it is biodegradable and, when mixed with soil and mulch, can be placed in the compost/mulch pile; she said the commission would replace damaged diapers within that timeframe.
Members asked whether the black color of some diapers might increase soil temperature in hot spells and whether reflective colors exist; the chair said she would share the manufacturer's information and Q&A for further review. Members also discussed operational benefits — reduced watering and fewer site visits — and handling of damaged or slippery gel if bags are broken and spread onto pavement.
