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Iris tectorum

Japanese roof iris

Garden

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Features

  • BloomsJune to August
  • Height0.2m to 0.45m
  • Spread0.3m
  • Growth HabitStalked clump
  • Flower ColourPale purple
  • Leaf ColourMedium green

Description

Iris tectorum (Japanese roof iris). This perennial species of Iris has petals which are frilled. This is a short plant which is mostly evergreen. They will need a sheltered location with a southern or western exposure. These plants will prefer rich, moist, acidic soil. The plants will benefit from mulching in the spring and autumn.

Characteristics

Perennial, Evergreen, Herbaceous

Other common names

Wall flag, Roof iris

Origin

Central, Southwestern China

Interest and use

Rock garden, edging, border

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Needs

  • LightPart shade
  • HardinessFully hardy (min -15°C)
  • SoilLight, Medium, Chalky
  • Soil pH5.0 to 7.0
  • WaterSemi-moist

Cultivation

They are fully hardy, but some groups may thrive only in specific growing conditions. All irises are best planted in late summer and early autumn. Outdoors you can grow them in well drained, fertile, neutral or slightly acid or alkaline soil in full sun to lightly dappled shade. In order for irises to thrive, most of them need long, hot summers. Irises that require protection from rain or frost should be grown under glass.

Propagation

By division of rhizomes or offsets in late summer or by seed in autumn. Certain cultivars should be propagated by division only.

Pests, diseases or disorders

Susceptible to viruses.

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