Scarlet spiderling
Boerhavia coccinea · Nyctaginaceae
The gardener's calendar
Ideal time to plant scarlet spiderling: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Flowering
- Summer to fall
- Mature size
- 30 to 60 cm in height
- Growth
- Fast
- Hardiness
- Frost-tender, warm climate
- Origin
- Tropical and subtropical America
- Soil type
- Well-draining, light to moderately fertile
Care
Watering
Water regularly during the growing season, keeping the soil moist but not waterlogged. Reduce watering in winter or during the dry season. Once established, the plant tolerates moderate periods of dryness.
Light exposure
Place Boerhavia coccinea in full sun or very light partial shade. It needs abundant light for generous flowering. Avoid overly shaded areas that slow down growth.
Soil
Prefer well-draining, light soil that is slightly acidic to neutral. A mix containing sand or leaf mold improves drainage. Avoid compacted soils or those that remain regularly waterlogged.
Fertilizer
Apply balanced fertilizer or one rich in phosphorus and potassium every 3 to 4 weeks during flowering. In winter or during dormancy, drastically reduce feeding. Overly nitrogen-rich fertilizer promotes foliage at the expense of flowers.
Pruning and cleaning
Remove spent flowers and dead stems to encourage branching and extend flowering. Light pruning in spring helps maintain a compact, bushy form. Remove any parts damaged by frost.
Pests and diseases
Watch for red spider mites and whiteflies in hot, dry conditions. Excessive watering or poor drainage can cause root rot or fungal diseases. Ensuring good air circulation prevents most problems.
Did you know?
Boerhavia coccinea is named after Herman Boerhaave, the famous 18th-century Dutch botanist and physician. Its small bright red flowers attract pollinators and hummingbirds in tropical regions. In Central and South America, several Boerhavia species are traditionally used in folk medicine for their supposed medicinal properties.
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.
Add this plant to my garden →Plants from the same family
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- Pisonia macranthocarpaPisonia macranthocarpa
- Red spiderlingBoerhavia diffusa
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Tips generated and checked by Viridia — adapt them to your local climate.