
Ueno yama
‘Ueno yama’ is a highly sought-after Japanese maple for its flamboyant budbreak: in spring, the young leaves emerge a brilliant orange, often with a fine red edging, creating a very luminous effect. The plant then turns light green to green in summer, before finishing in yellow-orange to orange-red tones in autumn. Its upright habit and dense branching make it an excellent subject for the garden as well as for container growing.
Character & interest
‘Ueno yama’ is a “seasonal” cultivar, particularly remarkable in spring. The overall effect is very visible from a distance (luminous orange), then the plant blends easily into the garden thanks to green summer foliage and a beautiful autumn transition. Its dense branching makes it possible to obtain a well-built plant, interesting even outside the peak colour periods.
Colours
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Spring : brilliant orange; often red-edged on the young leaves.
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Summer : luminous green to green (deeper in mid-summer).
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Autumn : yellow and orange, which can shift towards orange-red depending on conditions.
Habit & vigour
Upright habit, bushy and well branched (often described as “bushy”). Moderate to good vigour.
Indicative size
Observed orders of magnitude depending on sources and training:
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about 2 m at 10 years is often given by European collections,
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other references indicate 2.5 to 3.5 m at around 10 years,
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in the long term, it is frequently found around 3 to 5 m (depending on climate, soil and training).
Exposure
Bright partial shade or gentle sun. To keep the foliage clean, a sheltered position (dry winds, scorching sun) is ideal.
Origin & history
The name refers to Ueno, a district/park of Tokyo, often associated with the expression “Ueno yama” (“Ueno Hill”).
| Groupe MS | 3. Aureum |
|---|---|
| Habit | Upright |
| Vigueur | Vigoureuse |
| Taille 10 ans | Moyen (2-4m) |
| Forme de feuille | Palmate |
| Couleur Printemps | Orange / Jaune |
| Couleur Été | Jaune-vert |
| Couleur Automne | Jaune / Orange |
| Exposure | Mi-ombre |
| Size / Grade | C1, C1.5, C10, C2, C3, C5, C7.5, P9 |



