Jack-in-the-pulpit
Arisaema triphyllum · Araceae
The gardener's calendar
Ideal time to plant jack-in-the-pulpit: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Flowering
- Spring (April-May)
- Mature size
- 30 to 60 cm in height
- Growth
- Moderate
- Hardiness
- Zone 4 to 9 (-30 °C to -15 °C)
- Origin
- North America (Eastern Forests)
- Soil type
- Rich, moist, well-draining
- Exposure
- Shade to partial shade
Care
Watering
Keep the soil regularly moist during the growing season (spring-summer), without creating waterlogging. Gradually reduce watering in autumn as the foliage yellows. In winter, the plant is dormant and requires little water.
Exposure
Place your Jack-in-the-pulpit in shade or partial shade, ideally under a forest canopy. Avoid intense direct sun which can scorch the delicate leaves. A spot sheltered from wind is preferable.
Soil
Choose soil rich in organic matter, slightly acidic to neutral, and well-draining despite its moisture content. Improve the soil at planting with compost or peat. A mulch of fallen leaves helps maintain moisture and gradually enriches the soil.
Fertilizer
Apply balanced diluted fertilizer in spring when growth resumes. An annual application of well-decomposed compost is generally sufficient. Avoid excessive nitrogen which would promote foliage at the expense of flowering.
Pruning and maintenance
No pruning is necessary. Simply allow the foliage to disappear naturally in autumn. You can remove spent flowers if you don't want fruiting, but these small ornamental berries attract wildlife.
Diseases and pests
Generally resistant, Jack-in-the-pulpit can occasionally suffer from root rot if there is excessive waterlogging. Ensure adequate drainage. Few pests bother it; simply check for the absence of slugs in spring.
Did you know?
Jack-in-the-pulpit gets its name from the curious appearance of its flower: the spathe (colored bract) wraps tightly around the spadix and resembles a street preacher bundled in his coat. In North America, this plant was traditionally used by indigenous peoples, although it contains irritating crystals and is not edible. Its red berries, which appear in summer-autumn after flowering, provide a food source for birds.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
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Tips generated and checked by Viridia — adapt them to your local climate.