Tree trimming and pruning in St. Louis
Help My Tree offers tree pruning in St. Louis with a defined reason for each cut. For oaks, plan around Missouri’s oak wilt guidance. For city trees, settle permission before scheduling private work.[3][1]
Updated 2026-10-25
We will not top your tree.
What changes the plan for an oak?
MU Extension calls winter prime time for oak pruning.[3] Its high-risk window runs from mid-March through mid-July, and it reports oak wilt as widespread across Missouri.[3] Beetles carrying the disease are attracted to fresh wounds.[3] Give us the species if known and describe the clearance problem. An urgent hazard needs assessment, not an automatic instruction to wait until winter. Keep clear of a damaged limb and do not try to remove it yourself.
What if the tree is beside the sidewalk?
St. Louis defines street trees by public right of way, including sidewalk cutouts and spaces between curb and sidewalk.[6] Maintenance of a city tree requires the city’s Permit to Maintain.[1] The permit process includes Forestry inspection before pruning approval.[1] Do not treat a familiar tree in front of your house as permission to cut it. These are City of St. Louis requirements, not a rule for every municipality in the surrounding county.
How much pruning is useful?
Start with the problem rather than a percentage of the crown. ISA says mature trees generally receive corrective or preventive pruning.[9] Heavy pruning can reduce stored energy and stress the tree.[9] A request to “thin everything” needs a clearer purpose. Tell us whether branches obstruct a route, extend over a structure or have changed since damage. Ask which branches can stay and why the proposed work is sufficient.
What will we refuse to do?
We will not top your tree. ISA distinguishes reduction to suitable secondary branches from topping and says reduction better maintains form and structural integrity.[9] The aim is not to make every tree the same shape. Ask the person proposing work to explain the intended cuts in plain language. Correct pruning preserves the branch collar rather than cutting flush to the trunk.[9] You can ask about that detail without attempting the work yourself.
Will pruning cure a weak-looking tree?
Not necessarily. ISA says routine thinning does not automatically improve health.[9] MU Extension cautions that fertilizer does not solve poor drainage or improper watering.[8] If leaf loss or declining growth brought you here, begin with a tree-health discussion rather than asking to remove more foliage. Our rule is to test before adding anything. Many trees need no fertilizer.[8] Mulch does more for less is our starting position, not a promise for every site. A five-year soil study found woodchip mulch the most cost-effective individual treatment.[12]
Questions about this work
Do city pruning permits last indefinitely?
No. St. Louis says its tree permits expire 60 days after issuance.[1] Check the permission that applies to the actual work rather than relying on an old approval.
What should I include in my request?
State the tree location, the problem you want resolved and whether it appears to be in public right of way. Share a wide photo from a safe position. Do not approach damaged limbs to get a closer shot.