Arisaema nepenthoides
Arisaema nepenthoides is a distinctive cobra lily with a striking pitcher-shaped spathe and large, deeply lobed foliage. The dramatic flower, appearing in late spring to early summer, is typically a rich maroon or deep green with pale veining, resembling a carnivorous Nepenthes pitcher—hence the name! As the season progresses, its bold foliage creates a lush, tropical effect, persisting through summer before dying back in autumn.
Sold currently as flowering-size corms.
Height & Spread: Grows to around 50-80cm in height with a spread of approximately 40cm.
Soil: Requires moist, humus-rich, well-drained soil; thrives in organically enriched conditions.
Position: Best in partial to full shade; ideal for woodland gardens and shaded exotic plantings.
Flowering Time: Late spring to early summer (May to June).
Arisaema nepenthoides is a distinctive cobra lily with a striking pitcher-shaped spathe and large, deeply lobed foliage. The dramatic flower, appearing in late spring to early summer, is typically a rich maroon or deep green with pale veining, resembling a carnivorous Nepenthes pitcher—hence the name! As the season progresses, its bold foliage creates a lush, tropical effect, persisting through summer before dying back in autumn.
Sold currently as flowering-size corms.
Height & Spread: Grows to around 50-80cm in height with a spread of approximately 40cm.
Soil: Requires moist, humus-rich, well-drained soil; thrives in organically enriched conditions.
Position: Best in partial to full shade; ideal for woodland gardens and shaded exotic plantings.
Flowering Time: Late spring to early summer (May to June).
Arisaema nepenthoides is a distinctive cobra lily with a striking pitcher-shaped spathe and large, deeply lobed foliage. The dramatic flower, appearing in late spring to early summer, is typically a rich maroon or deep green with pale veining, resembling a carnivorous Nepenthes pitcher—hence the name! As the season progresses, its bold foliage creates a lush, tropical effect, persisting through summer before dying back in autumn.
Sold currently as flowering-size corms.
Height & Spread: Grows to around 50-80cm in height with a spread of approximately 40cm.
Soil: Requires moist, humus-rich, well-drained soil; thrives in organically enriched conditions.
Position: Best in partial to full shade; ideal for woodland gardens and shaded exotic plantings.
Flowering Time: Late spring to early summer (May to June).
Arisaema are fascinating woodland perennials, but to thrive in Scotland’s climate, they require careful planting and winter protection. Here are some essential tips to ensure their successful establishment:
1. Planting Depth & Position
Arisaema tubers should be planted deeply, around 5 inches (12-15cm) below the soil level. This depth helps protect them from winter cold and excessive moisture.
Choose a sheltered, partially shaded spot with dappled light, such as under deciduous trees or among ferns and hostas. Avoid areas prone to waterlogging.
2. Improving Drainage
Good drainage is essential to prevent tuber rot, especially in Scotland’s wetter conditions.
When planting, add a layer of gravel or coarse grit at the base of the hole to improve drainage and prevent standing water around the tuber.
Incorporate leaf mould or well-rotted compost into the soil to enhance structure while maintaining moisture balance.
3. Winter Protection
In colder regions, a thick winter mulch is highly recommended.
Once the foliage dies back in autumn, cover the planting area with a layer of leaf litter, straw, or bark mulch to insulate the tubers from deep frost.
In particularly harsh winters, consider adding a horticultural fleece or an upturned pot over the crown for additional protection.
4. Watering & Care
Keep the soil evenly moist during the growing season, but avoid overwatering. Arisaema dislike sitting in water.
Once dormant, reduce watering significantly, as excess winter moisture can lead to rot.
Avoid disturbing the tubers—Arisaema tend to settle in over time and perform best when left undisturbed.
By following these steps, your Arisaema should establish well and provide years of striking, exotic-looking foliage and flowers, even in Scotland’s challenging conditions.
