Care guide for Bonsai in Growing zone 3
September-November
Daily / Routine Tasks for Tree Health
• Watering: Monitor foliage and soil drying rates; water as required as evapotranspiration slows.
• Pest & Disease Management: Apply preventative treatments every two weeks or as needed.
• Wire Maintenance: Inspect wired branches regularly and remove or adjust wire that is beginning to bite.
• Tropical Trees: Move tropical species indoors when nighttime temperatures approach 10 °C or colder.
• Prepare tree quarters for winter dormancy. Best locations are north-facing walls and fences protected from winter winds.
• Watch for end-of-season discounts at local garden centres for soil, pots, and supplies.
• Ensure you have photos and records for activities mentioned in the Year Round Work section.
Care by Developmental Stage
Newly Dug Trees from Fall Dig
Primary goal: Pot trees and prepare for dormancy.
• Focus on recovery; avoid unnecessary top work.
Newly Dug Trees & Newly Potted Trees from Spring
Trees in Nursery Containers
Trees with Established Structure Requiring Balanced Growth
Trees in Refinement
Primary goal: Maintain strength and protect structure going into winter.
• Fertilize to support root health.
• Monitor and maintain wire; remove any that is biting.
• Avoid practices that encourage excessive late-season growth in Zone 3. For example, pruning late in the growing season can trigger tender new shoots that may not harden off (develop a cuticle) before autumn, leaving them vulnerable to early cold and dieback.
• Protect top dressing with screens or burlap before winter dormancy


