Cascades mahonia
Mahonia nervosa · Berberidaceae
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around cascades mahonia and prepare for winter.
ID card
- Foliage
- Evergreen
- Flowering
- Spring (April-May)
- Adult size
- 0.6 to 1.2 m in height
- Growth
- Slow to moderate
- Hardiness
- Zone 6-7 (-15 to -10 °C)
- Origin
- Western United States (California, Oregon)
- Soil type
- Well-drained, slightly acidic
Care
Light Exposure
Mahonia nervosa prefers partial to full shade. In warm climates, shade helps it maintain healthy, vibrant foliage. Excessive sun exposure can scorch the leaves, especially in Mediterranean regions. In naturally shaded areas, this plant thrives without difficulty.
Watering
Keep the soil moist but not waterlogged, particularly during the first year. Once established, the plant tolerates moderate drought well. Water regularly during hot and dry periods. In humid climates, reduce watering to avoid root suffocation.
Soil and Drainage
Well-drained soil remains essential to prevent root rot. Enrich the substrate with compost or acidic potting soil if your soil is too alkaline. Mahonia nervosa dislikes compacted soils and appreciates light mulching to retain moisture and maintain coolness.
Pruning and Maintenance
Pruning is not essential; respect the plant's natural shrubby form. If you wish to densify the plant or remove dead branches, prune in late winter before growth begins. Simply remove dead or misshapen wood with sharp shears or a pruning saw.
Fertilizing
Light fertilization each spring is sufficient to maintain vigor. Apply a balanced fertilizer or well-decomposed compost around the base. Avoid excess nitrogen, which reduces hardiness. The plant prefers moderate, regular feeding over nutrient shocks.
Pests and Diseases
Mahonia nervosa is generally robust and not very susceptible to common pests. In excessive moisture or poorly drained soil, fungal problems may occur. Ensure good air circulation, avoid overhead watering, and promptly remove any diseased foliage to prevent damage.
Did you know?
The name Mahonia honors Bernard M'Mahon, an Irish botanist and horticulturist of the 19th century. According to Native American mythology, the blue-black berries of certain mahonia species were consumed by indigenous peoples, which contributed to the popularity of this genus in European and North American horticulture.
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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- Darwin barberryBerberis darwinii
- Wintergreen barberryBerberis julianae
Tips generated and checked by Viridia — adapt them to your local climate.