Spanish dagger
Yucca aloifolia · Asparagaceae
📷 Miwasatoshi · CC BY-SA 4.0
⚠️ Feuilles et sève irritantes ; chiens et chats risquent irritation buccale et trouble digestif par contact ou ingestion.
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around spanish dagger and prepare for winter.
ID card
- Scientific name
- Yucca aloifolia
- Family
- Asparagaceae
- Foliage
- Evergreen, upright rosette leaves, spiny and bluish
- Flowering
- June to July, white bell-shaped flowers
- Adult size
- Approximately 4 m tall
- Growth
- Slow to moderate
- Hardiness
- Hardy to approximately -10 °C
- Origin
- North and Central America
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Yucca aloifolia accepts almost any soil as long as it's well-draining. Full sun ideally, tolerates partial shade.
The common mistake
Watering regularly like a hydrangea: it'll rot.
The pro's trick
Divide young basal offshoots in April-May and replant them in very draining substrate.
Care
Sunlight
Yucca aloifolia requires full sun exposure to develop properly and flower generously. Place it in a bright, well-ventilated location, away from overly humid areas. A south or west-facing exposure is ideal in temperate regions.
Watering
Water moderately during the growing season (spring-summer), allowing the soil to dry between waterings. Significantly reduce watering in winter, as the plant enters dormancy. In pots, check drainage to prevent root suffocation.
Soil
Prefer well-draining, light and poor soil, ideally sandy or gravelly. Yucca tolerates dry soils and even accepts low-fertility substrates. Avoid heavy, compact soils that retain moisture at all costs.
Fertilizer
Fertilizer application is optional, as this plant is undemanding. In pots, a moderate application of balanced fertilizer in spring is sufficient. In the ground, no fertilizer is necessary if the soil is decent.
Pruning
Prune spent flower stems above a healthy leaf after flowering. Regularly remove dead or damaged basal leaves. No drastic pruning is required; the plant branches naturally and forms an elegant silhouette.
Diseases and pests
Yucca aloifolia is generally robust. Excess moisture can promote root rot or fungal issues. Indoors, watch for mealybugs and spider mites. Ensure good ventilation and practice measured watering to prevent any problems.
Did you know?
Yucca aloifolia is nicknamed 'Joshua's sword' in reference to its characteristic pointed and threatening shape. Historically, pre-Columbian peoples used its fibers to make cordage and textiles. Introduced to Europe in the 16th century, it became a highly prized exotic symbol in Mediterranean gardens and prestigious botanical collections.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
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Tips generated and checked by Viridia — adapt them to your local climate.