Redwhisker clammyweed
Polanisia dodecandra · Cleomaceae
The gardener's calendar
Ideal time to plant redwhisker clammyweed: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Cleomaceae
- Plant type
- Annual herbaceous
- Mature size
- 30 to 80 cm tall
- Flowering
- July to September
- Exposure
- Full sun
- Hardiness
- Frost-tender (temperate to warm climates)
- Origin
- North and Central America
- Foliage
- Deciduous, aromatic
Care
Watering
Water regularly when planting and during dry periods, keeping the soil slightly moist. Once established, the plant tolerates relative drought well. Avoid excess water which could promote root rot.
Light Exposure
Polanisia thrives in full sun, ideally 6 to 8 hours of direct sunlight daily. It develops less well in partial shade. Place it in a location sheltered from prevailing winds if possible.
Soil and Terrain
It accepts poor, well-drained and even stony soils without particular requirements. Avoid overly compact or waterlogged soils. Slightly alkaline soil suits it well, but it adapts to most pH levels.
Fertilization
Undemanding, polanisia generally does not require fertilizer. A moderate application of balanced fertilizer in spring is more than sufficient. Avoid overdosing which would promote foliage at the expense of flowering.
Pruning and Maintenance
No pruning is necessary. You can pinch young plants to encourage a bushier habit. Remove faded flowers regularly to extend flowering. At the end of the season, allow a few flowers to form seeds if you want self-seeding the following year.
Pests and Diseases
Very robust, it is rarely affected by serious pests or diseases. Occasionally watch for aphids on young shoots. Good plant spacing and good air circulation reduce any risk of fungal problems.
Did you know?
Polanisia dodecandra owes its scientific name to its characteristic flowers dotted with approximately twelve stamens arranged in a distinctive manner. Although little known in Europe, it has long been used by Indigenous peoples of North America for its aromatic and repellent properties. Its leaves and flowers emit a strong, musky fragrance that would repel certain pest insects.
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.