Gladiolus grandiflorus Yellowa ® - Sword Lily
Gladiolus grandiflorus Yellowa ® - Sword Lily
Gladiolus x grandiflorus Yellowa ®
Large-Flowered Gladiolus, Sword Lily
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Description
Gladiolus Yellowa® is a gladiolus with large flowers in bright yellow, selected for cut flowers. Its XXL, straight and well-balanced flowering stems bear numerous tightly packed florets on spectacular spikes, both in the garden and in a vase. It allows you to obtain professional-quality stems in less than three months.
A perennial bulbous plant due to its corm, Gladiolus Yellowa® belongs to the Iridaceae family, which also includes irises and freesias. Its distant ancestors are primarily of South African origin. It is classified in the horticultural group of large-flowered gladioli (Grandiflorus/Grandiflora), characterised by large funnel-shaped flowers arranged on a spike on tall stems. This cultivar was obtained as part of the Prisma Gladiolus breeding programme at Zabo Plant in the Netherlands.
Its vigorous stems reach and exceed 1.20 m in height. They bear a well-filled spike of large, bright yellow florets, with a slightly deeper centre. The medium green, long and narrow, sword-shaped foliage forms an upright bundle at the base of the flowering stems. Flowering occurs in summer, from July to September, depending on the planting date, approximately 10 to 12 weeks after planting the corms. The vegetation is deciduous: the foliage dies back completely after flowering, the corm enters dormancy and must be protected from frost.
In the garden, plant the Yellowa® gladiolus in small clumps at the back of borders or in rows in a dedicated cut flower area. Its yellow spikes pair particularly well with the anemone-flowered dahlias ‘Totally Tangerine’ and 'Platinum Blonde'. To lighten the overall effect, you can add a flexible ornamental grass, for example Pennisetum alopecuroides ‘Hameln’, and a few bulbs of Crocosmia ‘Paul’s Best Yellow’ in the same warm tones. In a vase, it makes superb cut flower arrangements with a few stems of eucalyptus or artemisia.
The Gladiolus genus takes its name from the Latin gladius, meaning sword; in the Netherlands, gladioli are even presented to walkers who complete the "Four Days of Nijmegen", extending their ancient symbolism of strength and victory.
Plant habit
Flowering
Foliage
Botanical data
Gladiolus
x grandiflorus
Yellowa ®
Iridaceae
Large-Flowered Gladiolus, Sword Lily
Gladiolus × hortulanus Yellowa ®, Gladiolus grandiflorus Yellowa ®
Cultivar or hybrid
Planting and care
Hybrid gladioli Yellowa thrive in rich, fertile, yet well-drained soils, such as loamy and sandy types. Plant in full sun, sheltered from the wind. Space the bulbs or corms 10 to 15 cm apart, covered with 10 cm of soil. Feed after cutting the flowers. Avoid using manure, which promotes bulb rot.
Gladioli are sensitive to frost. Therefore, they should be lifted once they have faded or immediately after the first frosts. Cut the leaves and allow the plants to dry in a well-ventilated area for three weeks. Detach the old bulbs. Store the new bulbs and the bulblets throughout the winter in a cool, frost-free place. The bulblets will flower in two years. It is preferable not to plant gladiolus bulbs in the same spot for several consecutive years. An annual rotation will yield better results.
In mild climates, Gladiolus can be planted in September-October and overwinter in situ.
Planting period
Intended location
Care
Planting & care advice
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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 zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
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:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
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.