JACK IN THE PULPIT Arisaema triphyllum
A beautiful woodland plants with attractive and intriguing flowers. A hooded spathe flops over a waxy spadix. These plants are very long lived, and form dense clumps. Bulbs can be lifted and divided to populate other areas. These plants are very easy to grow, and amaze us with their versatility, growing in various soils (including sandy) and can tolerate a great amount of drought once established. Sun requirements are also versatile, as we have ours in a half-sun location, even though they are traditionally woodland/shade plants. Very hardy (even though they look exotic)!
Type: Hardy perennial
Height: 24", 2 feet
Hardiness zones: 3-9
Bloom time: Late spring and summer
Seed per pack: 5
Note: This plant species is known to contain oxalate crystals, in the juice or sap of these seeds or this plant. These crystals can irritate the skin and/or cause a rash, and ingestion can cause swelling in the mouth and throat.
Germination: As with many perennial seeds, these seeds require a period of moist cold to help them break dormancy. This is done by giving them a cold 'winter' period (artificial or natural), and then a warming to simulate 'spring', and time to grow! Here's how this can be done:
Obtain a planting container that has holes in the bottom for excess water to drain. Place the seeds just under the surface of your growing medium, and water. Place your container in a cold area (but not freezing, perhaps a refrigerator) for 4-6 weeks. Once the cold period is completed, place the container at room temperature for them to germinate. Be sure to keep the soil moist during this entire germination period. Seedlings will sprout a few weeks, or occasionally several months, after the warming period.
If you are planting your seeds in late winter or spring, these seeds can be planted outdoors while it is still cool out (once the ground is workable and unfrozen), to receive the cold period naturally in the garden.