American cancer-root
Conopholis americana · Orobanchaceae
The gardener's calendar
Ideal time to plant american cancer-root: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Orobanchaceae
- Plant type
- Parasitic herb
- Flowering
- April to June
- Mature size
- 15 to 30 cm in height
- Origin
- Eastern and central North America
- Growth
- Fast (depending on host availability)
- Hardiness
- Hardy, down to -20 °C
- Life cycle
- Semi-underground parasitic plant
Care
Exposure and location
Conopholis americana grows naturally under deciduous trees, in shaded to semi-shaded areas. It doesn't require conventional cultivation, as it lives by parasitizing the roots of oaks, birches and other forest hosts. If you wish to observe it, place it in a natural wooded area.
Substrate and soil conditions
This parasitic plant requires rich, organic, humid, forest soil for its host to thrive. It develops at the expense of tree roots, so no specific amendments are needed for the plant itself. An established wooded environment is essential for its survival.
Watering
No direct watering is necessary. Conopholis americana draws water through its parasitized host. Simply maintain the natural moisture of the surrounding forest soil, without creating waterlogging.
Nutrition and fertilizer
No fertilizer should be applied. This plant obtains all its nutrients from the host tree through parasitic connections. Any chemical input would be pointless and could disturb the local ecological balance.
Pruning and maintenance
No pruning is practiced. Conopholis americana naturally disappears after fruiting. Let the flowers and fruits develop naturally, then the plant will disintegrate on its own.
Health and pests
In its natural environment, this plant is generally little subject to diseases. Its short life cycle and parasitic nature make it discreet. Avoid any disturbance to the soil or host tree, which could compromise its reproduction.
Did you know?
Conopholis americana is a completely parasitic plant devoid of chlorophyll, which explains its distinctive brown-yellowish color. It remains underground for much of the year and only emerges to flower briefly in spring, resembling a miniature corn inflorescence. It's a fascinating demonstration of plant parasitism in North America!
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.