Tree Service University of California-Davis

Frequently Asked Questions About Tree Services

What is the best way to protect trees during construction?

Protecting trees during construction projects is crucial for preserving their health and preventing damage. Here are some key steps to take:

• Tree Protection Zone (TPZ): Establish a designated area around the trees that is off-limits to construction activities. The size of the TPZ depends on the tree's size and species, but generally, it should extend to the drip line (the outermost edge of the tree's canopy).
• Root Protection: Avoid digging, trenching, or compacting the soil within the TPZ. If excavation is necessary, use hand digging or air spading to minimize root disturbance.
• Trunk Protection: Protect tree trunks from damage by wrapping them with protective barriers, such as burlap or plywood.
• Branch Protection: Avoid cutting or damaging branches unless absolutely necessary. If pruning is required, have it done by a certified arborist.
• Watering: Ensure trees receive adequate water during construction, especially if the soil has been disturbed or compacted.
• Monitoring: Regularly monitor trees for signs of stress or damage during and after construction.

Consulting with a certified arborist during the planning stages of a construction project can help ensure the protection of valuable trees on the site. They can provide expert advice on establishing TPZs, minimizing root disturbance, and mitigating potential impacts on tree health.

How close to a house can you plant a tree?

The recommended distance for planting a tree from a house depends on the tree's mature size and root system. As a general rule, plant trees at least:

• 10 feet away from foundations for small trees (mature height under 30 feet).
• 20 feet away from foundations for medium-sized trees (mature height 30-70 feet).
• 30 feet or more away from foundations for large trees (mature height over 70 feet).

Planting too close can lead to root damage to foundations, sidewalks, or underground utilities. It's always a good idea to research the mature size and root system of the specific tree species you're considering and consult with a certified arborist for guidance on proper placement.

What is the best time of year to trim trees?

The best time to trim trees depends on the tree species and the type of trimming needed. Here are some general guidelines:

• Dormant Season (Late Fall to Early Spring): This is generally the best time to trim most deciduous trees (those that lose their leaves in fall) as they are not actively growing. Trimming during dormancy reduces stress on the tree and allows for better wound closure.
• Spring: Light pruning and shaping can be done in spring before the tree's leaves fully emerge.
• Summer: Trimming can be done in summer to remove dead or diseased branches. However, avoid heavy pruning during hot weather, as it can stress the tree.
• Fall: Some light pruning can be done in fall after the leaves have fallen, but it's best to avoid major pruning before winter.

Specific tree species may have different optimal trimming times, so it's always best to consult with a certified arborist for guidance. They can assess your trees and recommend the best time to trim them for optimal health and safety.

How do I know if a tree is dying?

A dying tree can exhibit several signs, but it's essential to remember that some signs may also indicate stress or other problems that are treatable. Here are some common indicators of a dying tree:

• Extensive dieback: Large portions of the tree's crown are dead, with no signs of new growth.
• Severe bark damage: Large sections of bark are missing or severely damaged, exposing the inner wood.
• Root decay: Mushrooms or conks growing at the base of the tree, indicating fungal decay in the root system.
• Leaning precariously: The tree is leaning significantly and showing signs of instability.
• No leaves or buds: During the growing season, the tree is completely bare of leaves and shows no signs of new buds forming.
• Woodpecker holes: While a few woodpecker holes are not necessarily a cause for concern, numerous holes can indicate insect infestation or decay within the tree.

It's essential to consult with a certified arborist to confirm whether a tree is dying or can be saved. They can assess the tree's condition, identify the cause of the decline, and recommend the best course of action.