Arisaema concinnum

Arisaema concinnum is an exotic woodland beauty, grown for its dramatic, hooded “cobra-like” flower and handsome, architectural foliage. The striking spathe (hood) often shows rich colouring and subtle striping, with a curious, elegant spadix at the centre—making it a real collector’s plant and a total conversation starter in the shade garden. It’s perfect for adding something a little unusual to woodland borders, shady courtyards, or containers in a sheltered spot, where it can be admired up close.

Given the right conditions—cool roots, moisture in spring and summer, and good drainage in winter—Arisaema concinnum will return each year with increasing presence and character.

Planting Instructions

When to Plant:

Plant in spring while dormant or just as growth begins. You can also plant in early autumn in milder areas, provided the soil is not waterlogged.

Where to Plant:
Choose a sheltered position in partial shade to full shade with moist, humus-rich, well-drained soil. Arisaema concinnum is ideal for woodland gardens, shady borders, under shrubs and containers. Avoid very dry spots and heavy soils that stay wet in winter.

How to Plant:

• Depth: Plant the tuber/corm about 10–15 cm (4–6 inches) deep.
• Spacing: Space 30–45 cm (12–18 inches) apart, allowing room for the plant to mature.
• Soil Prep: Mix in plenty of leaf mould or well-rotted compost. In heavy soils, add grit to improve drainage.

Watering:
Water well after planting and keep the soil evenly moist during the growing season. Reduce watering once the foliage dies back. In pots, do not allow compost to dry out completely in spring and early summer.

Aftercare Tips:

• Mulch annually with leaf mould or compost to keep roots cool and moist.
• Allow foliage to die back naturally—this feeds the tuber for next year.
• In colder or wetter gardens, add winter protection with a dry mulch to protect the tuber from cold and wet.
• If growing in a container, move the pot to a sheltered spot over winter to prevent waterlogging and freezing.

Top Tip:
Arisaema concinnum looks stunning among ferns and other woodland plants. The key to success is moisture in the growing season but good drainage in winter—think “damp in summer, drier in winter”.

Plant Details

Flowering Period:

May - June (sometimes into July depending on season)

Height:
18–36" (45–90cm)

Position:
Partial shade / full shade

Hardy Perennial
(Performs best with winter protection in colder, wetter gardens)