Isodon effusus


Availability : Available

Description :

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
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Pépinière Le Clos d'Armoise
Moustoir Lorho


- The nursery is closed to visitors - Opening on Wednesday 22 August

The nursery is closed to visitors on Monday, Tuesday, Thursday, Friday, Sunday and public holidays.