Spirea thunbergii
Spiraea thunbergii is a fine-textured, deciduous shrub known for its slender, arching branches and masses of small white flowers that cover the plant from late Winter through early Spring. Its narrow, willow-like green leaves turn yellow to orange in Autumn, offering multi-season interest and a delicate, airy presence in the landscape.
Perfect for cottage, Japanese-inspired, or informal garden styles, Spiraea thunbergii is ideal for borders, low hedging, or feature planting. It thrives in full sun to light shade with free-draining soil and benefits from light pruning after flowering to maintain its natural form. Space approximately 80-100 cm apart when planting in groups or as a low hedge.
Forms a graceful, arching shrub approximately 1.2 metres high and 1.5 metres wide.
Trimming: Prune immediately after flowering in late winter or early spring. Lightly shape the plant and remove dead or woody stems to maintain a graceful, arching form. Avoid hard pruning, as next year’s flowers form on old wood.
Deadheading: Not required, as spent flowers fall naturally and do not significantly affect plant health or appearance.
Fertilising: Apply a balanced, slow-release fertiliser in early spring to support healthy growth and abundant flowering. In nutrient-poor soils, a second light feed after flowering may help.
Watering: Water regularly during the establishment phase. Once established, Spiraea thunbergii is moderately drought tolerant but benefits from deep watering during extended dry periods.
Pest Control: Typically pest-free. Occasionally, aphids may appear-treat with insecticidal soap or horticultural oil if necessary.
Disease Management: Rarely troubled by disease. Ensure good airflow through light pruning and avoid overhead watering to prevent fungal issues. Remove any diseased foliage as needed.
Enjoy complimentary delivery anywhere in mainland New Zealand when you purchase plants worth $250 or more*.
For orders below $250, the following flat-rate delivery charges are applicable:
- Urban delivery within mainland New Zealand: $19.95
- Rural delivery within mainland New Zealand: $39.95
- Waiheke, Chatham and Great Barrier Islands: Please contact us for shipping options.
We aim to have all orders shipped within 14 days from the order date, unless a different shipping date is specified alongside a product.
