Madagascar ragwort
Senecio madagascariensis · Asteraceae
The gardener's calendar
Ideal time to plant madagascar ragwort: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- Madagascar Ragwort
- Family
- Asteraceae
- Form
- Annual to short-lived perennial herb
- Adult size
- 30 to 80 cm tall
- Foliage
- Persistent, medium green, finely divided
- Flowering
- Spring to summer, yellow flowers in small clusters
- Origin
- Madagascar and tropical regions of southern Africa
- Hardiness
- Frost-tender (0 to 5 °C minimum)
- Growth
- Fast and vigorous
Care
Light and exposure
Place Senecio madagascariensis in full sun or partial shade for optimal flowering. This plant loves warmth and tolerates very sunny exposures well. Indoors, choose a bright window facing south or west.
Watering
Water regularly during active growth periods, keeping the substrate moist but not waterlogged. Reduce watering in winter or during dormancy. Avoid standing water, which promotes root rot. Water in the morning preferably.
Substrate and soil
Use a well-draining mix made of light potting soil enriched with perlite or coarse sand. This plant dislikes excessive moisture and prefers neutral to slightly acidic soil. Good drainage is essential to prevent fungal diseases.
Fertilization
Apply a balanced, diluted fertilizer every 15 days during the active growing phase (spring-summer). Reduce applications in autumn and stop in winter. Avoid excess nitrogen, which promotes foliage at the expense of flowers.
Pruning and cleaning
Pinch back young shoots regularly to encourage bushy, branched growth. Remove spent flowers to extend the blooming period. Clean the foliage to remove dust and prevent pests.
Pests and diseases
Watch for aphids and spider mites, which thrive in hot, dry conditions. Excess moisture promotes rot and mold. Maintain good air circulation and avoid high temperatures combined with stagnant air.
Did you know?
Senecio madagascariensis has become invasive in certain Mediterranean and Australian regions where it escaped from ornamental cultivation. Its remarkable adaptability and rapid reproduction capacity make it a pioneer plant capable of quickly colonizing disturbed areas, making it a species of major ecological interest for understanding biological invasion processes.
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.