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Family: Fabaceae · Pot diameter: 15 cm · Height: 70 cm
Wisteria ‘Naga Noda’ turns a pergola into a spring spectacle that is impossible to overlook. Its exceptionally long, airy racemes descend like lilac-blue waterfalls, carrying fragrant single flowers that open gradually from the base towards the tip. Hanging freely, they gain movement and depth with every breeze. It is a superb choice for bringing romance, drama and an increasingly impressive living landmark to the garden as it matures.
Above a seating area, path or entrance, it creates a high flowering canopy and makes beautiful use of vertical space while leaving the ground level visually open. The loose arrangement of the flowers allows light to filter through, while the old, twisted trunk develops a sculptural presence that remains striking even in winter.
It stands apart for its extraordinary scale, the gradual opening of its flowers and the permanent woody framework it builds across its support.
On a mature, well-trained plant, the hanging racemes can reach around 1 m or more, so they need ample clearance to display their full length.
The fragrant, single pea flowers are spaced relatively loosely along the stem and open from the base upwards, placing open flowers and buds together on the same raceme.
The compound green foliage turns yellow in autumn and falls, revealing the twisted woody trunk, permanent horizontal arms and short flowering spurs in winter.
Why you will love it: it does far more than add colour — it turns a strong structure into a living, fragrant ceiling and a memorable focal point in the garden.
Show it off on a tall, sturdy pergola or arch capable of carrying the weight of mature wood, or train it against a wall on strong horizontal wires. The support should allow the racemes to hang freely without touching a low roof. Plan from the outset for the space it will need as it grows: with support it can reach 8–12 m and spread laterally beyond 8 m.
Pair the lilac-blue flowers with clean white, violet and soft lemon-yellow accents. Place companion plants in the outer zones rather than close to the woody trunk, and choose them to suit the light, soil moisture and drainage in each area.
Full sun produces the richest flowering. It tolerates light partial shade, but usually with fewer flowers.
Water deeply when the soil surface dries, without leaving the roots constantly wet.
A very hardy deciduous climber, rated RHS H6. Choose a sheltered position to protect young growth and flowers.
Harmful if eaten by people or pets; take particular care with the seeds and pods. Wear gloves when handling or pruning.
The stems climb by twining around their support; they do not have aerial roots or adhesive pads. Train one main trunk and permanent horizontal framework branches over a pergola, arch or strong wires spaced about 30 cm apart. Check the ties as the wood thickens.
Choose a sunny, sheltered position and deep, fertile, well-drained soil that stays cool without becoming waterlogged. Avoid places where water collects in winter or strong wind batters the hanging racemes.
Plant it at the same depth at which it stood in its pot, water thoroughly and secure the main shoot without constricting it. Keep a clear circle around the base and add an organic mulch over the soil without letting it touch the trunk.
The current 15 cm pot is not suitable for long-term growth. For long-term container growing, move it gradually into a much larger, heavy pot—eventually at least 45 cm across—with excellent drainage and its own sturdy support; it will reach its full potential more readily in the ground.
Keep moisture even while it establishes and water deeply during prolonged dry spells. Severe drought, particularly from July to September, can restrict the formation of flower buds for the following spring.
In ordinary garden soil, well-rotted compost in spring is usually enough. If growth is weak, apply a balanced fertiliser sparingly; too much nitrogen encourages long leafy shoots at the expense of flowering.
In July or August, shorten the long shoots made that year to 5–6 leaves, about 30 cm from the permanent framework branch. This checks their vigour, lets light into the plant and begins shaping the flowering framework.
In January or February, cut the same side shoots back again to 2–3 buds, about 10 cm. Keep the permanent framework branches clear and remove unwanted or tangled growth before the new season begins.
Establishment comes first. Select one strong main shoot, guide it upwards and allow the plant to root deeply without expecting immediate cover or flowering.
As it reaches the upper level, train selected shoots horizontally. Summer and winter pruning gradually turns unruly growth into framework branches furnished with short flowering spurs.
Over time the old wood thickens and the pergola develops a denser network of flowering spurs. Reaching its full mature scale takes 10–20 years and ample room for long-term growth.
At maturity, a supported plant can reach 8–12 m in height and spread over 8 m, with a thick twining trunk, permanent framework branches and racemes hanging freely beneath the beam.
The main display appears in late spring. Compound green foliage dominates in summer, turns yellow in autumn and falls to reveal the trained woody framework in winter.
What to expect after planting: a young plant may initially invest more energy in roots and shoots than in flowers. With consistent training and correct twice-yearly pruning, its woody framework develops more short flowering spurs and the display becomes richer over time.
The story of ‘Naga Noda’ begins not with a modern named breeder, but with Japan’s long-standing horticultural tradition of wisterias bearing exceptionally long racemes. At Ushijima in the city of Kasukabe, a monumental plant was already famous by the late Edo period. The name Kyūshaku refers to “nine shaku” — about 2.7 m — in legendary historical accounts of its raceme length, while the name Noda Naga Fuji is also used in Japan.
This historic plant was designated a Natural Monument of Japan in 1928 and a Special Natural Monument in 1955. Stories attributing an age of more than 1,200 years to it belong to local tradition; its documented fame can be traced with certainty to the late Edo period. This cultural history explains why the name became so closely associated with exceptionally long racemes.
In modern botanical classification, the name Wisteria floribunda ‘Naga-noda’ is treated as a synonym of Wisteria floribunda f. multijuga ‘Kyushaku’. The exact date of selection and the name of its originator are not recorded, but it belongs to this long-established Japanese horticultural tradition.
In Wisteria floribunda, the whole raceme does not open at once. Flowering progresses from the base towards the tip, so the lower flowers are already open while buds remain at the end — the mechanism that gives a long raceme its characteristic rhythm.
In stems of the species about 2 cm thick or more, cortical parenchyma cells can restart local divisions and form additional cambia that produce new xylem and phloem. Molecular analysis has linked this unusual growth to differential expression of conserved KNOX genes.
The fragrance of the species does not come from a single molecule. GC–MS analysis of Wisteria floribunda flowers recorded 22 volatile compounds, dominated by the monoterpenes linalool and (E)-beta-ocimene — a complex chemical signature behind its spring scent.
Practical answers about sunlight, support, flowering, pruning and safe placement for this particular wisteria.
Full sun usually gives the richest flowering. It can grow in light partial shade, but as direct light decreases it is more likely to produce more foliage and fewer racemes.
A sturdy, permanent pergola or arch is ideal because it allows the long racemes to hang freely. Against a wall, it needs firmly anchored horizontal wires. A lightweight trellis will not carry the weight of mature wood.
The main display appears in late spring alongside the new foliage. Its long racemes open gradually from the base upwards and create the cultivar’s characteristic spring spectacle.
A young plant often prioritises roots and its woody framework. Too little sun, excess nitrogen, incorrect pruning or severe summer drought can also reduce flowering. Proper training and consistent twice-yearly pruning help turn long shoots into short flowering spurs.
In July or August, shorten the long shoots made that year to 5–6 leaves, about 30 cm. In January or February, cut the same side shoots back to 2–3 buds, about 10 cm, leaving the main permanent framework branches intact.
No. All parts are harmful if eaten, with particular care needed around the seeds and pods. Position it where small children and pets cannot easily reach fallen material, and wear gloves when pruning.
