Johnson, Vermont, (small town, all volunteer) has a new Tree Board and we’re drawing up a maintenance plan for our two year old planting of 56 municipal trees. They’re a mixture of Kentucky Coffee Trees, Pin Oaks, Red Maples, and Japanese Tree Lilacs, and half of them are planted in sidewalks with grates. There are no oaks in the sidewalks. The rest are in open ground. These trees are 6-7 years old and were planted in poor soil by the lowest bidding contractor in a Main St overhaul. The pits in the sidewalks are 4X4′ and have no underwater source.
Is there a guideline for the amount of water each needs? Should we fertilize; if so how often and with what kind? Pruning is under control. Any other suggestions?