Table 3.

Key elements of an urban forest maintenance regime.

ElementExplanationExamples
TypeThe particular maintenance activityPrune, mulch, stake, etc.
WhoParty physically performing maintenance activityCity tree crews, contracted certified arborist, nonprofit, adjacent homeowner, etc.
IntensityHow much20% of the crown, 18.9 L or 57.8 L of water, etc.
FrequencyHow oftenA four- or six-year pruning cycle, once per week, etc.
DurationHow longFor just the first growing season after transplanting, throughout a tree’s life, etc.
ExtentWhat part of a tree or which treesBranches below 4.3 m clearance level, all trees in a city, trees on heavily traveled road corridors, trees in a downtown area, etc.