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Arisaema galeatum

Arisaema galeatum
Cobra lily

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More information

This plant is one of the biggest in its group. During early summer, it produces cone-shaped flowers with curled tips. The flowers are green with stripes of light green and orange at the base. After flowering, a big leaf with three parts grows to 140 cm (55 in). The leaf is light green with a hint of violet. This plant likes rich, humus-filled soil and can endure cold weather as long as the soil is well-drained.
Flower size
9 cm
Height at maturity
1.40 m
Spread at maturity
50 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -15°C
Soil moisture
Moist soil
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Best planting time March to April
Recommended planting time March to June
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Flowering time June to August
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Description

The cobra plant, known scientifically as Arisaema galeanum, is native to the Himalayas and is a large species in the arum family. It produces dark green spathes with a flared, helmet-like appendage at the tip. The flowers grow up to 60 cm (24in) above the ground, sheltered under a textured leaf that sits at a height of 140 cm (55in). These flowers appear in early summer and are followed by a large trifoliate leaf that is pale green with a rose-violet wash. This plant thrives in dappled light and rich, humus soil and can tolerate cold temperatures in well-drained soil.

There are currently over 150 species of Arisaema that are mostly native to Asia. Over half of these species are found in temperate zones and can be easily cultivated in our latitudes. These plants prefer a wooded environment, humus-rich, cool soil but not waterlogged.

The flowers are dioecious, meaning there is only one sex per plant. If a male plant (even of a different species) is planted nearby, the female plant produces red fruits at the end of the season. This plant enters a vegetative rest at the end of summer as a tuber.

The cobra plant is not well-known to gardeners but can be planted in cool, well-drained, and light soil. It can create beautiful and original potted plants paired with ferns, bamboo, hostas, Epimedium, Bégonia grandis, rhododendrons, azaleas, or oriental lilies.

Arisaema galeatum in pictures

Arisaema galeatum (Flowering) Flowering

Flowering

Flower colour green
Flowering time June to August
Inflorescence Spadix
Flower size 9 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 1.40 m
Spread at maturity 50 cm
Growth rate normal

Botanical data

Genus

Arisaema

Species

galeatum

Family

Araceae

Other common names

Cobra lily

Origin

Himalayas

Product reference41801

Planting and care

Arisaemas are tough plants that require specific conditions to thrive. They grow best in soil that is light, humus-rich, and well-draining. During the summer, the soil should never dry out, but in the winter, it should not be waterlogged as it can cause the bulb to rot. Partial shade near large trees with a west-facing exposure is the best location to plant them.

If you have heavy soil, you can mix in 1/3 leaf compost and 1/3 non-chalky sand to improve it. Mix it to a depth and width of 20-25cm (8-10in). When planting the Arisaema galeatum bulb, create a small bed of perlite and plant the bulb at a depth of 6-8cm (2-3in). Cover it with substrate to prevent rotting during the winter.

For planting in a pot, use a wide terracotta pot that is wider than it is tall. Fill it with a substrate that is half perlite or vermiculite and half leaf compost. Plant the bulbs 6-8cm (2-3in) underground and keep the soil moist, but not waterlogged. During winter, store the pot in a frost-free location and maintain a slightly cool temperature. Every 2 weeks, give it a few drops of water. In early spring, around April, resume watering as soon as the bulbs begin to sprout.

6
€19.50
16
€14.50 Each

Planting period

Best planting time March to April
Recommended planting time March to June

Intended location

Suitable for Woodland edge, Undergrowth
Type of use Border
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Amateur
Planting density 9 per m2
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, humus-bearing and lightweight

Care

Pruning No pruning necessary
Disease resistance Very good
Overwinter Can be left in the ground

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