Seasonal Tree Care Guide for Knox County Homeowners

Trees in Knox County experience four distinct seasons and four distinct sets of challenges. Heavy summer storms, ice in January, oak wilt in spring, drought in late summer — each requires specific care to keep your trees thriving. This seasonal guide walks you through the tree care priorities for every quarter of the year.

Spring (March – May)

Spring is when most of your tree care happens. As trees wake from dormancy, this is the window to inspect, prune, and treat.

• Inspect for winter damage. Walk every tree and look for split branches, cracks, hanging limbs, and root heave from saturated soil. Schedule cleanup pruning immediately.
• Finish structural pruning before bud break. Late February through mid-March is ideal for most species.
• Apply slow-release fertilizer if needed. Have a soil test done first — Knoxville soils often do not need additional nitrogen.
• Mulch root zones. Two to three inches of hardwood mulch in a wide ring (never against the trunk).
• Do not prune oaks. Avoid all oak pruning from April 1 through July 31 to prevent oak wilt transmission.

Summer (June – August)

Summer in East Tennessee means heat, humidity, sudden thunderstorms, and the occasional drought. Focus shifts from active care to monitoring and protection.

• Water deeply during dry spells. Established trees need an inch of water per week. Drought-stress symptoms include early leaf drop and crispy leaf edges.
• Watch for insect and disease activity. Bagworms on evergreens, Japanese beetles on ornamentals, anthracnose on dogwoods. Early treatment is far more effective than late.
• Inspect after every storm. Microbursts in Knox County routinely shred canopies. Hanging branches over walkways and structures are immediate hazards.
• Avoid heavy pruning. Stressed trees do not seal wounds well in heat. Limit summer work to dead wood and storm damage.

Fall (September – November)

Fall is preparation season. The work you do now sets up your trees for winter and the following spring.

• Continue deep watering through October. Trees that go into winter well-hydrated handle ice and wind much better.
• Refresh mulch. Top off mulch rings as old material decomposes.
• Plant new trees. Mid-October through Thanksgiving is the best planting window in Knoxville. Cool air, warm soil, and winter rains let new trees establish roots before summer stress.
• Rake leaves away from trunks. Leaf piles harbor moisture and rodents that damage bark.
• Schedule winter pruning. Book your February pruning appointment now — calendars fill quickly after the first ice storm.

Winter (December – February)

Winter is when arborists do their best work. Dormant trees show their structure clearly, and disease pressure is at its lowest.

• Get serious pruning done. Crown thinning, structural reduction, deadwood removal — all best in dormancy.
• Inspect for storm damage after every event. Ice storms in particular create hanging limbs that fall days later.
• Protect young trees from rodent damage. Voles chew bark under snow cover. Hardware cloth or tree wrap around the lower trunk solves it.
• Plan next year's projects. If you are considering removing a problem tree, winter is the cheapest time to schedule it.

Year-Round Habits

A few habits pay dividends regardless of season. Look up at your canopy every time you walk the property — your eyes catch problems your phone never will. Avoid string-trimming or mowing too close to trunks. Never pile soil, mulch, or sod against the bark. Call a certified arborist any time you see a tree behaving differently than it did the year before.