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Gladiolus Addi Claudia - Sword Lily

Gladiolus x colvillei Addi Claudia ®
Colville's Gladiolus, Sword Lily

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A dwarf gladiolus, about 50cm (20in) tall. It bears spike inflorescences, each bearing up to ten bright red flowers with distinct yellow stripes. They create a stunning contrast against its green foliage. Flowering begins in June and can last until August. Hardier than the larger hybrids, this type of gladiolus can remain in the ground during winter if it is protected by a good mulch.
Flower size
6 cm
Height at maturity
50 cm
Spread at maturity
20 cm
Exposure
Sun
Hardiness
Hardy down to -9°C
Soil moisture
Moist soil
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Best planting time April
Recommended planting time March to May
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Flowering time June to August
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Description

Gladiolus 'Claudia' is a dwarf variety that is easy to grow. It can remain in the ground during winter if protected by a good mulch. At the end of spring, it produces spikes adorned with bright red star-shaped flowers with decorative yellow streaks. With a more natural appearance than the classic tall hybrids that can look a bit stiff, this variety easily integrates into a mixed border. It looks wonderful alongside perennials or low-growing bushes.

 

The gladiolus genus belongs to the Iridaceae family, which mainly includes herbaceous plants such as crocus, iris, ixia, and crocosmia. There are over 260 botanical species of gladiolus, the majority of which are native to South Africa and tropical Africa. There are numerous hybrids and horticultural varieties divided into three main groups: Grandiflorus (large-flowered), Primulinus (early-flowering), and Nanus (butterflies).


Gladiolus x colvillei, obtained in England in 1823, is the first known cultivated hybrid resulting from the cross-breeding of G. cardinalis from South Africa, where it grows on damp cliffs and near waterfalls, and G. tristis, also from the same origin but with a lower habit.


'Claudia' is a highly ornamental and floriferous variety, reaching a height of no more than 50 to 60cm (20 to 24in), with a width of about 20cm (8in). This perennial herbaceous plant forms dark green thin leaves that resemble swords (gladiolus gets its name from the shape of its sword-like leaves, derived from the Latin word gladius). From June onwards, floral spikes appear above the foliage, bearing floral buds arranged alternately to the right and left. These flower stalks are adorned with 6 to 10 buds that open into flowers composed of six tepals, meaning three petals and three sepals that are essentially of the same appearance, although their dimensions may vary slightly. The three upper ones are a uniform scarlet red, while those in the lower part are ornamented with a central yellow stripe that stands out against the red background. The bright red flowers harmonise perfectly with its green foliage, creating an attractive scene for two to three months. Measuring about 6cm (2in) in diameter, the flowers express undeniable grace and romantic charm. The storage organ, called a corm, is a pseudo-bulb, which is a swollen stem with scales. Each corm produces two or three flower spikes. It prefers a sunny exposure and moist but well-drained soil.

 

It is easy to grow and requires no staking. The corms can remain in the ground during winter. Although of modest size, its bright red blooms capture all eyes. It can be grown in a pot on a patio or balcony. It is also easy to integrate into a mixed border. Create a romantic scene by planting it with the Nozomi ground cover rose, with its single wild rose-like flowers in pearly white and pink. For a more striking combination, choose the 'Double Punch Gold' shrubby cinquefoil, a charming small bush with finely cut foliage that is covered in vibrant yellow double flowers throughout summer. Alchemilla 'Thriller' will also be a good companion, with its unique foliage on which raindrops form like pearls, and its airy summer flowering in a sulphur yellow.

 

Plant habit

Height at maturity 50 cm
Spread at maturity 20 cm
Growth rate very fast

Flowering

Flower colour red
Flowering time June to August
Inflorescence Spike
Flower size 6 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Botanical data

Genus

Gladiolus

Species

x colvillei

Cultivar

Addi Claudia ®

Family

Iridaceae

Other common names

Colville's Gladiolus, Sword Lily

Origin

Cultivar or hybrid

Planting and care

Choose a sunny position. 'Claudia' loves rich, fertile, well-drained soils. Sandy and loamy soil is ideal. It dreads compact clay. Avoid using manure to fertilise the soil as it causes bulb rot. Plant the corms 8 to 10cm (3 to 4in) deep, spaced 10 to 15cm (4 to 6in) apart. Water regularly during its growth and flowering period. The corms appreciate being dry during the resting period. The corms of this variety can overwinter in the ground, in well-drained, healthy soil, covered with a thick mulch to prevent damage from severe frosts. In very cold regions, dig up the plants as soon as the leaves have yellowed. Store the corms in turf and keep them dry, protected from heat and frost.

The corms can also be grown in pots, which can be protected indoors over winter. Plant 20 corms per 20 to 22cm (8 to 9in)) pot.

Planting period

Best planting time April
Recommended planting time March to May
Planting depth 10 cm

Intended location

Suitable for Meadow
Type of use Border, Container
Hardiness Hardy down to -9°C (USDA zone 8b) Show map
Ease of cultivation Amateur
Exposure Sun
Soil pH Any
Soil moisture Moist soil, Well-drained, enriched with coarse sand.

Care

Pruning No pruning necessary
Soil moisture Moist soil
Disease resistance Good
Overwinter Needs protection

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