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Spacing: 12-15 in. (30-38 cm) 15-18 in. (38-45 cm)
Hardiness: USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F)
Sun Exposure: Partial to Full Shade
Danger: All parts of plant are poisonous if ingested
Bloom Color: Red Green Purple Dark Purple/Black Maroon (Purple-Brown) Brown/Bronze
Bloom Time: Mid Spring Late Spring/Early Summer
Foliage: Herbaceous
Other details: Requires consistently moist soil; do not let dry out between waterings
Soil pH requirements: 4.6 to 5.0 (highly acidic) 5.1 to 5.5 (strongly acidic) 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral)
Propagation Methods: By dividing rhizomes, tubers, corms or bulbs (including offsets) From seed; direct sow outdoors in fall
Seed Collecting: Remove fleshy coating on seeds before storing Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds Seed does not store well; sow as soon as possible
On May 20, 2008, trioadastra from Ellsworth, WI (Zone 4a) wrote:
These are growing wild in my backyard, so they are definately zone 4 hardy. I had heard they were rare in the wild, but they are coming up everywhere, and spread easily by seed. The young plants only send up one or two sets of leaves, and the mature plants will flower in progressively larger sizes. New corms are smaller than pea size, and I have some large ones that are golfball size. They also transplant easily, and can take a fair but of sun, but like to be kept moist.
On May 14, 2008, Katze from Minneapolis, MN (Zone 4a) wrote:
Plant is native to Minnesota and is hardy to Zone 4 (per care information that came with my plant).
I planted two of these last spring; thought both had died due to over-watering last summer. Today, I was pleasantly surprised to find that one plant is still alive and about to bloom! Definitely a unique-looking plant that adds interest to any shade garden.
On Sep 10, 2007, Maece from Colorado Springs, CO (Zone 5b) wrote:
Most providers list the plant as being hardy to zone 5. However, this website ([HYPERLINK@www.plantdelights.com]) claims that "Arisaema triphyllum and A. dracontium are two of the most hardy species, with each growing well into zone 3 and 4."
Regional...
This plant has been said to grow in the following regions:
Plainfield, Illinois Greenville, Indiana Hobart, Indiana Indianapolis, Indiana Melbourne, Kentucky Cedar Springs, Michigan Pinconning, Michigan Saginaw, Michigan Isle, Minnesota Minneapolis, Minnesota Saint Cloud, Minnesota Port Ludlow, Washington Ellsworth, Wisconsin
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