A city that values its trees
Sacramento is known for its tree canopy, and many neighborhoods are shaded by large, mature trees: oaks, sycamores, elms, maples and many others. Those trees keep streets and houses cooler in a city where National Weather Service records include stretches of nine or more consecutive days at 100°F or higher. They also need care. Large, old trees over houses, driveways and sidewalks can drop limbs, and their roots can lift paving and invade old sewer lines.
Permits and street trees
Sacramento has rules protecting certain trees, and many street trees in the planting strip are city-managed. Before removing or heavily pruning a large tree, especially a native oak or a tree near the street, check with the City of Sacramento or Sacramento County, depending on where you live, or ask the contractor to confirm whether a permit is required. Removing a protected tree without permission can bring fines and replacement requirements.
Summer heat and drought stress
Long, hot, dry summers stress trees, especially when irrigation is cut back. Signs include leaf scorch, early leaf drop and thinning canopies. Deep, infrequent watering of established trees during the dry season, out toward the drip line rather than at the trunk, helps many species. Mulch over the root zone keeps soil cooler and holds moisture. Stressed trees are more vulnerable to pests and diseases, so watch for borers and dieback.
Summer branch drop is something arborists see in some large trees on hot, still afternoons, when a limb that looks healthy breaks without warning. It's another reason to have large limbs over patios, driveways and play areas assessed.
Winter storms
Most of Sacramento's rain falls in winter. When storms bring heavy rain and wind together, soaked soil holds roots less firmly, and large trees with root problems or heavy, poorly structured canopies can fail. The city sits where the American and Sacramento rivers meet, and some neighborhoods have high water tables in wet years. If a tree's soil heaves or cracks during a storm, or a lean appears suddenly, keep away and have it assessed. Pruning to reduce weight on long limbs and removing deadwood before storm season reduces risk.
Fog and fungal problems
Winter tule fog can keep canopies and bark damp for days. Some fungal diseases thrive in those conditions. Pruning during dry weather and cleaning tools between trees helps limit spread. If you see cankers, oozing sap or mushrooms at the base of a tree, ask an arborist to diagnose it.
Roots and infrastructure
Mature trees in older neighborhoods often have roots in sewer laterals and under sidewalks and driveways. Before cutting large roots to repair paving, talk to an arborist; cutting major roots can destabilize a tree. Root barriers and alternative paving designs are sometimes options.
Before you hire
Ask Sacramento tree care contractors whether your tree needs a permit, how they'll protect your property, whether they follow recognized pruning standards and avoid topping, and for proof of insurance. Check the contractor's California license with the CSLB; tree work often falls under a specific license classification.