Althea Shrub Blue with Dark Heart – Hibiscus syriacus ‘Oiseau Blue’ | ↕45 cm | Ø17 cm

Althea Struik
Hibiscus syriacus ‘Oiseau Blue’

Hibiscus syriacus ‘Oiseau Blue’ is a beautiful, richly flowering shrub with striking blue-purple flowers and a dark center. This deciduous garden plant blooms abundantly in the summer and provides a unique and stylish appearance in the garden. Thanks to its low-maintenance nature, this hibiscus is ideal for borders, as a solitary plant, or in a hedge.

Latin name: Hibiscus syriacus ‘Oiseau Blue’
Dutch name: Hibiscus / Altheastruik
Height: 45 cm
Mature height: 150–250 cm
Width: 100–150 cm
Leaf: Green, hand-shaped
Evergreen: No
Flowers: Large, blue-purple with dark center
Blooming period: July – September
Growth habit: Upright, bushy

Light requirement: Sun
Soil: Well-drained, nutrient-rich soil
Moisture: Average

Pot size: Ø17 cm
Number of plants: 1
Plant density: 1–2 plants per m²

Pruning: Lightly prune in early spring to maintain shape and stimulate blooming
Watering: Water regularly, especially during dry periods
Fertilization: Provide organic fertilizer or compost in spring

Winter hardiness: Good winter hardy
Poisonous: Not poisonous

Why choose Hibiscus syriacus ‘Oiseau Blue’?
A low-maintenance and richly flowering shrub with unique blue-purple flowers that stand out in the garden. Perfect as a focal point or as part of a colorful border.