Lemon daylily
Hemerocallis lilioasphodelus · Asphodelaceae
📷 W. Bulach · CC BY-SA 4.0
The gardener's calendar
Ideal time to plant lemon daylily: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- Yellow Daylily
- Family
- Asphodelaceae
- Plant type
- Herbaceous perennial
- Mature height
- 60 cm
- Foliage
- Deciduous or semi-evergreen depending on climate
- Flowering
- May to June
- Hardiness
- Very hardy (down to -15°C)
- Origin
- Asia (China, Japan)
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Yellow daylily is ultra-low-maintenance: plant it, forget it, and it comes back stronger every year. Deadhead spent flowers or cut stems down to ground level in November to tidy up.
The common mistake
Thinking it needs regular watering or rich soil—once established, it's an independent plant, and too much fussing actually weakens it.
The pro's trick
Divide the clump every 4–5 years in autumn (September–October) to rejuvenate the plant and create new specimens: each division usually takes off beautifully.
Seasonal watch
Very few seasonal issues.
Care
Light and Exposure
Yellow daylilies prefer full sun exposure (at least 6 hours per day) for optimal flowering. They tolerate partial shade but will flower less abundantly. Plant them in an open location to promote good air circulation and prevent fungal issues.
Watering
Water regularly after planting to establish a strong root system. Once established, yellow daylilies have moderate water needs and tolerate drought periods well. In summer, keep the soil slightly moist without creating waterlogging.
Soil Type
This plant adapts to most well-drained soils. It prefers soil rich in organic matter but also tolerates poor soils. Improve the soil at planting time by incorporating compost or potting soil to promote better establishment.
Nutrition and Fertilization
Apply a balanced fertilizer in spring when growth resumes. A second application after flowering will help the plant replenish its reserves. A layer of compost on the surface each autumn is generally sufficient for established plants.
Pruning and Cleaning
Remove spent flowers as they appear to encourage continued flowering. In late autumn or early winter, cut back the foliage to ground level if you're growing a deciduous variety. Regularly remove dead or damaged leaves to maintain the plant's appearance.
Diseases and Pests
Yellow daylilies are generally very robust and rarely susceptible to diseases. Watch out for slugs and snails that can damage young foliage in spring. Insufficient drainage can promote root rot, so be sure to avoid waterlogged conditions.
Did you know?
The name 'daylily' comes from the Greek 'hemera' (day) and 'kallos' (beauty), because each flower blooms for only one day. This characteristic makes it a fascinating plant: you can observe its entire flowering cycle in just 24 hours. In Asia, the yellow daylily has long been used both as an ornamental plant and as a food source, with its flower buds being consumed in certain traditional dishes.
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.