September Tree Care Tips
September Tree Care Tips for Puget Sound, Washington

As summer fades and fall approaches, September marks a pivotal time for tree care in the Puget Sound region. The transition from dry, warm days to the cooler, wetter conditions of fall offers an ideal opportunity to prepare your trees for the upcoming season. Here are some essential tree care tips to keep your landscape thriving as the weather shifts.
1. Watering Adjustments
While the Pacific Northwest is known for its rain, late summer and early fall can still experience dry spells. Keep an eye on soil moisture levels and continue watering your trees deeply, especially those newly planted or established in areas with poor drainage. As temperatures drop and rains become more frequent, you can gradually reduce your watering frequency.
2. Mulching
A fresh layer of mulch around your trees helps retain moisture, regulate soil temperature, and suppress weeds. Apply a 2-4 inch layer of mulch around the base of your trees, making sure to keep it a few inches away from the trunk to prevent rot.
3. Pruning Preparation
September is a great time to assess your trees for any dead, diseased, or damaged branches that may need pruning before the winter storms arrive. Focus on removing limbs that could pose a risk to your property or become hazardous in strong winds. For large or complex pruning tasks, consider hiring a professional arborist to ensure the job is done safely and effectively.
4. Pest and Disease Monitoring
As fall approaches, pests and diseases can become more active. Watch for signs of common issues like aphids, scale insects, or fungal infections. Early detection and treatment are key to preventing more significant problems later on. If you're unsure about what to look for, a certified arborist can help identify and address any concerns.
5. Fertilization
Fall is an excellent time to fertilize your trees, providing them with the nutrients they need to recover from the stress of summer and prepare for winter. Use a slow-release fertilizer to encourage root growth and overall tree health. Avoid high-nitrogen fertilizers at this time, as they can promote late-season growth that's vulnerable to frost damage.
6. Planning for New Plantings
If you're considering adding new trees to your landscape, September is an ideal month to plan and prepare. The soil is still warm, which encourages root development, and the cooler weather reduces transplant shock. Choose native species that thrive in the Puget Sound climate, such as Douglas Fir, Western Red Cedar, or Bigleaf Maple.
7. Inspecting Tree Stability
Strong winds and saturated soils in the fall can lead to tree instability. Inspect your trees for signs of root damage, leaning, or soil erosion around the base. If you notice any issues, consult with a tree care professional to determine the best course of action.
Conclusion
September is a crucial month for tree care in the Puget Sound region, setting the stage for a healthy, resilient landscape through the fall and winter months. By taking the time to water, mulch, prune, monitor, fertilize, and plan, you'll ensure your trees are well-prepared for whatever the coming seasons bring. If you need assistance with any of these tasks, don't hesitate to reach out to a local arborist for expert guidance.
For more information or to schedule a consultation, contact us at Sound Tree Care LLC. We're here to help you keep your trees healthy and safe all year round.
