Ismene deflexa
Ismene deflexa · Amaryllidaceae
⚠️ Chiens, chats et enfants : bulbe toxique par ingestion, provoque troubles digestifs et irritation buccale.
The gardener's calendar
Ideal time to plant ismene deflexa: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- Spider lily
- Family
- Amaryllidaceae
- Type
- Bulbous plant
- Adult height
- About 50 cm
- Flowering
- June to August
- Foliage
- Deciduous
- Hardiness
- Low hardiness, grow in a pot or in a warm region
- Origin
- South America
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Plant Ismene bulbs in April-May, pointed end up, buried just 5 cm deep. The common mistake is planting them too deep—they need to breathe.
The common mistake
Planting the bulb too deep or too early, before the soil warms up (it hates cold roots).
The pro's trick
Dig up the bulbs in November and store them dry and cool (10-12°C); this guarantees generous flowering the following year.
Seasonal watch
In August-September, watch out for powdery mildew if moisture sits around after flowering; if it threatens, reduce watering and improve air circulation.
Care
Light exposure
The spider lily needs full sun exposure for abundant flowering and well-colored flowers. Place it where it receives at least 6 hours of direct sunlight daily. In very hot regions, light afternoon shade can be beneficial.
Watering
Water regularly during the growth and flowering period to keep the soil slightly moist, without waterlogging. Gradually reduce watering after flowering. In winter, during the bulb's dormancy period, significantly reduce water supply.
Soil and potting mix
Use well-draining soil rich in organic matter: mix quality potting soil, sand, and compost. Drainage is essential to prevent bulb rot. A pot with drainage holes is essential.
Fertilizer
Apply balanced fertilizer or potassium-rich fertilizer every 15 days during the growth and flowering phase. Stop all fertilizing in autumn and winter to encourage bulb dormancy.
Pruning and cleaning
Remove faded flowers as they appear to extend flowering. After flowering, let the foliage yellow naturally before cutting it back, so the bulb can rebuild its reserves. Regularly clean off dry or damaged leaves.
Diseases and pests
Watch for red spider mites and mealybugs, particularly indoors. Excess moisture can promote fungal rot: ensure good drainage and air circulation. Regularly air out the foliage.
Did you know?
The spider lily gets its common name from the spectacular shape of its flowers: their fine, curved petals, adorned with long delicate stamens, resemble a spider's legs. Native to the Andes of South America, this plant was cultivated by the Incas and symbolizes elegance and delicacy in modern gardens.
Where to buy it
Plant the bulbs in autumn for spring flowering. Pick a plant with healthy foliage and roots that are not exposed. Best time: from September to November.
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- OnionAllium cepa
- Belladonna lilyAmaryllis belladonna
Tips generated and checked by Viridia — adapt them to your local climate.