Whip Cord Lily
Arisaema Tortuosum thick 4' tall fleshy petiole (stalk) emerges in early June, adorned by two tropical looking palmate green leaves near the top. As the leaves unfurl, the pitcher that tops the stem opens to reveal a green Jack-in-the-pulpit flower, but with a whip-like tongue that extends from the mouth of the flower upwards to 12 or more inches. In autumn, bright red berries ripen on the tall stem of those plants that have set seed. This wonderful plant for the woodland garden starts out about 50 cm tall, but it can eventually attain 2 m and form large clumps
Cool, dappled shade under a spreading canopy of trees is ideal for growing arisaema. However, the north or east side of a building, that protects them from all day sun and heat will work as well. While arisamea can and do thrive in an astonishing array of countries and elevations, it is critical to get the specific conditions right for them to flourish in your garden. The soil must be moist but not wet, with excellent drainage to ensure the tubers and roots do not rot.
Arisaema are highly prone to rot in poorly drained conditions. The soil should also be porous – with plenty of air spaces. Work the soil well to break up any compacted areas, and incorporate leaf mold, compost and perlite to improve both the nutrition and structure of the soil. Raised beds or small hillocks will also help you to achieve the level of drainage so important for happy cobra lilies. & excellent drainage. It should be planted with plenty of sharp sand and coarse bark immediately surrounding the tubers & will thrive in an organically-rich surrounding substrate with plenty of leaf mould and humus.
Plant arisaema tubers 4-6 inches deep, to give them a good opportunity to develop a healthy network of roots, and to protect from cold in the lower zones of their hardiness range. Arisaema should be kept lightly moist, but not wet. Excellent drainage is critical to ensuring your tubers do not rot. Once potted they should be watered sparingly when their new roots are shoot emerging, thus minimizing the chances of the tuber rot. Water in the evenings with a sprinkler or watering can when the soil is dry
When the root system has developed and leaves begin to unfold from the leaf-sheates, they can be watered regularly and fertilized with slow release fertilizers.
Once the flowering is complete and the leaves turn yellow, watering should be discontinued and tubers given rest during their dormancy period.
Arisaema makes a bold statement in the garden & can be used in indoor gardens and balconies. It is also used as back border or focal plant due to its height, beautiful trumpet-shaped flowers and leaf texture.
The general rule of thumb for planting spring bulbs is to plant two to three times as deep as the bulbs is tall. This means most large bulbs like tulips or daffodils will be planted about 8 inches deep while smaller bulbs will be planted 3-4 inches deep. Planting depth is measured from the bottom of the bulb.