Siberian pea shrub
Caragana arborescens · Fabaceae
📷 A. Barra · CC BY 3.0
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around siberian pea shrub and prepare for winter.
ID card
- Foliage
- Deciduous
- Flowering
- May to June, yellow flowers
- Adult size
- Approximately 4 m in height
- Growth
- Fast
- Hardiness
- Very hardy, down to -40 °C
- Origin
- Siberia and Mongolia
- Soil type
- Undemanding, tolerates poor and dry soils
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Caragana arborescens grows vigorously and tolerates almost everything. Plant it young and stake it for 2 years.
The common mistake
Giving it too much fertilizer: it's a Fabaceae that fixes nitrogen.
The pro's trick
Cut it short to 80 cm high in the first dormant season if you want a bushy shape.
Care
Sunlight
Install the pea tree in full sun to promote abundant flowering. It also tolerates partial shade but will flower less generously. It's a very light-loving plant that benefits from at least 6 hours of direct sunlight per day.
Watering
Once established, this shrub is very low-maintenance in terms of water. Water regularly during the first year to promote root establishment. In normal climates, natural rainfall is sufficient; intervene mainly during prolonged droughts.
Soil
The pea tree adapts to most soils, even poor, stony or compacted ones. It slightly prefers well-drained terrain. This shrub fixes nitrogen from the air thanks to its root nodules (Fabaceae family), making it very self-sufficient.
Pruning and shaping
Prune lightly after flowering (June-July) to maintain a compact and harmonious shape. Remove dead or diseased branches as needed. Harder pruning is possible in spring before growth resumes.
Fertilizer
No fertilizer is necessary thanks to the plant's ability to fix atmospheric nitrogen. A mulch in spring is enough to gradually enrich the soil with organic matter.
Diseases and pests
The pea tree is very robust and rarely affected by diseases or pests. In case of excessive moisture, watch for root rot. Generally, no treatment is necessary.
Did you know?
Caragana arborescens is a fascinating tree used in Siberia for centuries to create natural windbreaks, so legendary is its hardiness. It has also been employed in agroforestry to improve poor soils thanks to its symbiosis with nitrogen-fixing bacteria. Its edible pods and sprouted seeds constitute a traditional food source in certain Asian regions.
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
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- Common PeaLathyrus oleraceus
- Honey locustGleditsia triacanthos
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Tips generated and checked by Viridia — adapt them to your local climate.