Conyza sumatrensis
Conyza sumatrensis · Asteraceae
The gardener's calendar
Ideal time to plant conyza sumatrensis: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous, pubescent and lanceolate
- Blooming
- July to October, white or pale pink flowers
- Adult size
- 0.60 to 1.50 m in height
- Growth
- Very fast
- Hardiness
- Low hardiness, frost-tender below 0 °C
- Origin
- South America (Brazil, Argentina)
- Soil type
- Undemanding, tolerates poor and disturbed soils
Care
Watering
Water regularly during the active growing period, especially in hot and dry weather. Fleabane appreciates moderate moisture but tolerates dry spells well. In winter, reduce watering significantly.
Light
Place this plant in full sun for optimal growth and abundant flowering. It also accepts partial shade but will flower less generously. Avoid overly shaded locations.
Pruning
Pinch back young stems regularly to branch the plant and obtain a more compact shape. After flowering, remove spent flowers to prolong blooming. A thorough cleanup pruning in late winter encourages renewal.
Soil
Fleabane adapts to most soils, even poor or disturbed ones. A light, well-draining substrate is preferable to prevent root suffocation. Improve if needed with compost to enrich the medium.
Fertilizer
Apply a balanced fertilizer every 15 days during growth and flowering. A formulation rich in potassium will promote beautiful blooms. In winter, stop fertilizing.
Diseases and pests
Fleabane is generally robust and not very susceptible to pests. Watch for aphids and whiteflies in humid indoor conditions. Powdery mildew can appear with poor air circulation; ventilate regularly.
Did you know?
Fleabane is a pioneer species that rapidly conquered disturbed spaces in urban and agricultural zones in Africa, Europe, and Asia after escaping from botanical gardens. Some sources classify it as an invasive plant due to its ultrafast growth and ability to produce thousands of lightweight seeds dispersed by wind.
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.