Japanese Maple
Acer palmatum · Momiji (紅葉)
The quintessential deciduous bonsai. Japanese Maples showcase delicate palmate leaves, blazing crimson and amber autumn foliage, and intricate winter branch ramification that rewards disciplined pruning.
Substrate & Soil Mix
70% Akadama, 20% Pumice, 10% High-grade Organic Compost.
Watering Discipline
High water demand; keep evenly moist, especially during active summer growth.
Sunlight & Placement
Morning sun with 50% dappled afternoon shade to prevent leaf scorch.
Pruning & Pinching Window
Spring bud pinching (metsumi); structural branch pruning in late winter before sap rises.
Wiring Season
Early summer when branches are flexible, or autumn after leaf-drop.
Repotting Cadence
Every 1–2 years for young trees; 2–3 years for mature maples in early spring.
Curatorial Cultivation Manual
Irrigation Technique
Requires consistent moisture. In high summer, daily or twice-daily watering may be required. Never allow the root system to completely dry out.
Seasonal Fertilizing Program
Apply balanced, low-nitrogen organic fertilizer from bud opening until early summer. Avoid high nitrogen, which creates excessively long internodes.
Pruning & Pad Refinement
Pinch new shoots back to the first pair of leaves in spring. Defoliation (ha-gari) can be performed in June on healthy, vigorous specimens to force smaller leaves.
Root Reduction & Repotting
Repot in early spring just as buds show green tips. Maples produce extensive fibrous roots and benefit from aggressive root flat-trimming.
Winter Cold Protection
Roots in ceramic pots are susceptible to freeze damage below -5°C (23°F). Overwinter in an unheated garage, shed, or sheltered cold bench.
Common Pests & Pathogens
- Aphids
- Verticillium wilt
- Red spider mites
- Powdery mildew
Traditional Classical Styles
- Informal Upright (Moyogi)
- Broom (Hokidachi)
- Group / Forest (Yose-ue)
- Root-over-Rock
Document Your Japanese Maple in Kenara
Log repotting histories, track seasonal wiring timelines, and run optical foliage health diagnostics on your trees.