Quite simply superb!
Isodon effusus, commonly known as Trumpet Spurflower, is a perennial endemic to the mountainous areas of Honshu, Shikoku and Kyuszhu (Japan). Its delicate, indescribable (!) autumnal flowering will delight the gardener-collector. The Trumpet Spurflower has a light, upright demeanour, reaching 80 cm in height and flowering abundantly in October-November.
It's worth thinking about combining it in a garden design with the sublime Anemone 'Ruffled Swan'. It’s a plant match that can be very successful. They have the same flowering period, the same blue, the same botanical origin, but what a lovely contrast in the shape of the flowers.
Tip: If you've located the plant in a good spot, rays of shimmering sunlight will fill its tubular blue-mauve flowers and turn them into tiny lanterns to illuminate the semi-shaded areas of the garden.
Grow preferably in partial shade in good, humus-rich garden soil that is not too dry.
Avoid heavy, damp soils and competition from roots (dry shade).
Maintenance of Isodon effusus:
- prune to shape in early summer;
- cut back the plant at the end of winter;
- watch out for the numerous natural seedlings!
Synonyms: Isodon longitubus var. effusus (Maxim.), Plectranthus effusus (Maxim.), Amethystanthus effusus (Maxim.), Rabdosia effusa(Maxim.)
- 0,7 litre pot
- Hardiness zones : zone 6-10
- Height: 70 to 100cm
- Plant spacing: 60 cm
- Flower colour: blue
- Flowering period: autumn flowers