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Calylophus serrulatus Superlophus Yellow - Yellow Sundrops
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Dispatch by letter from €3.90.
Delivery charge from €5.90 Oversize package delivery charge from €6.90.
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This plant carries a 12 months recovery warranty
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We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
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Calylophus serrulatus 'Superlophus Yellow' (synonym Oenothera serrulata 'Superlophus Yellow') is a remarkably floriferous perennial bush that blooms in summer, with large lemon yellow flowers that open during the day, unlike those of its close relative, the evening primrose. It forms a slightly loose, low bushy clump, with slender, long, bright green leaves. It is a plant that thrives in full sun and well-drained, even dry soil. Perfectly suited for rock gardens, borders, and waterless flower beds, it is also welcomed in containers to liven up the terrace or balcony throughout the summer.
Oenothera serrulata 'Superlophus Yellow' is a selection by Voltz known for its wider flowers compared to the species. The wild species is native to dry meadows and mesas in western North America, particularly the Great Plains from Canada to Texas. In well-drained, dry (rocky) soil, its roots can withstand temperatures as low as -15°C. It belongs to the Onagraceae family. The 'Superlophus Yellow' variety is a woody-based perennial with a taproot that can reach deep for moisture. The root does not like to be disturbed. The plant forms a low, slightly loose clump, with few branches, measuring between 25 and 45cm in height. It has narrow, lance-shaped leaves with distinct toothed edges, a fairly light green color, and can reach up to 5-6cm in length. This deciduous foliage dries up in autumn. The flowering period extends from June-July to September, even in dry soil. The cup-shaped flowers have 4 lemon yellow petals, measuring 3 to 4cm in diameter, and bloom during the day. This flowering attracts bees and butterflies. The flowers give way to 2cm long seed capsules.
This Calylophus 'Superlophus Yellow' is a plant that thrives in full sun and well-drained, even dry soil. It will be the perfect companion for rock gardens, slopes, and border plantings, especially in Mediterranean regions. When grown in pots or containers on a terrace or balcony, it will require more regular watering. Pairing it with blue-flowering shrubby salvias will create a beautiful effect. It will also be a great companion for lavenders and Echinops or globe thistles. It can also be planted in front of shrubs such as Perovskia, Teucrium 'Azureum', and Caryopteris.
Flowering
Foliage
Plant habit
Botanical data
Plant Calylophus 'Superlophus Yellow' in spring in full sun, at a rate of 9 plants per square metre to obtain ground cover, or with a spacing of at least 30cm in a flower bed. This plant is highly resistant to heat. Choose its location carefully to avoid disturbing its taproot during transplantation. It can be grown in all types of well-drained soils, even rocky ones, preferably dry, and requires very little maintenance: water during planting and the first year, until the plant is properly rooted. Once it is well established, stop watering. Removing faded flowers is not necessary. However, it is very useful to prune the clump in spring to encourage branching and maintain a compact habit.
Planting period
Intended location
Care
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
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The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.