Bristly locust
Robinia hispida · Fabaceae
📷 Eoghanacht at English Wikipedia · Public domain
⚠️ Graines et écorces contiennent glycosides cyanogènes; ingestion provoque troubles digestifs, nausées chez chiens/chats/enfants.
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around bristly locust and prepare for winter.
ID card
- Scientific name
- Robinia hispida
- Family
- Fabaceae
- Plant type
- Shrub
- Foliage
- Deciduous
- Flowering
- May to June
- Adult height
- Approximately 2 m tall
- Hardiness
- Hardy, down to -15 °C
- Origin
- North America (southeastern)
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Rose Acacia (Robinia hispida) loves rich, well-draining soil and full sun. Water sparingly once established.
The common mistake
Trying to form a single trunk: this is a multi-stemmed plant, hard pruning exhausts it and it will decline.
The pro's trick
Let the basal shoots develop naturally—that's its natural form.
Care
Sunlight
The Rose Acacia thrives in full sun, which promotes generous and abundant flowering. Place it in a location receiving at least 6 hours of direct sunlight daily. In very hot regions, light afternoon shade can prevent summer stress.
Watering
Water regularly during the first year to establish the root system. Once established, this shrub tolerates moderate drought well. Keep the soil slightly moist during prolonged dry periods, but avoid waterlogging which can rot the roots.
Soil
Rose Acacia adapts to most soils, including poor and chalky soils. However, it prefers well-drained, light and fertile soil. Adding potting soil or compost at planting improves establishment and initial growth.
Pruning and training
Prune lightly after flowering to maintain a compact and bushy shape. Remove dead or crossing branches as soon as you spot them. Rose Acacia branches naturally and doesn't require drastic pruning; gentle intervention is sufficient.
Fertilization
This shrub is undemanding. An application of well-decomposed compost in spring supports growth. In depleted soil, a balanced fertilizer applied at the start of the growing season can stimulate flowering and vigor.
Pests and diseases
Rose Acacia is generally robust. Watch for aphids in spring and remove them if needed with a water spray or mild treatment. In poorly drained soil, root rot may occur; ensure adequate drainage therefore.
Did you know?
Robinia hispida, native to the southeastern United States, earned its nickname Rose Acacia from its magnificent candy-pink flowers grouped in dense clusters, which appear in May-June. Although often confused with the true Black Locust (Robinia pseudoacacia), this species stands out with its stems covered in reddish bristles and its smaller size, making it an ideal choice for small gardens enchanted by its spectacular blooms.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
- Chinese wisteriaWisteria sinensis
- Common broomCytisus scoparius
- Black locustRobinia pseudoacacia
- Common PeaLathyrus oleraceus
- Honey locustGleditsia triacanthos
- Hairy greenweedGenista pilosa
Tips generated and checked by Viridia — adapt them to your local climate.