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Gloxinia speciosa Kaiser Wilhelm

Gloxinia speciosa Kaiser Wilhelm
Florist's Gloxinia, Painted tongue, Showy Gloxinia, Brazilian Gloxinia

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A superb gloxinia with highly contrasting flowers. They are deep purple and velvety, widely edged with pure white, with a very dark throat. These large bell-shaped flowers are enhanced by a bouquet of velvety leaves. This tuberous perennial, which blooms from June to September, is a beautiful plant to decorate your interior or a windowsill.
Flower size
8 cm
Height at maturity
25 cm
Spread at maturity
35 cm
Exposure
Partial shade
Hardiness
Hardy down to 4°C
Soil moisture
Moist soil
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Best planting time April
Recommended planting time April to June
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Flowering time June to September
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Description

Gloxinia 'Kaiser Wilhelm' is a variety with a retro charm. Its bicoloured and velvety bell-shaped flowers are dark violet with a wide white border. They offer a magnificent contrast in light and shade. The flowers are beautifully displayed against a backdrop of velvety, dark green foliage. This perennial tuberous plant blooms for a good part of summer. It is easy to grow and looks spectacular in the house, or on a windowsill. Place it in partial shade, protected from direct sunlight.

 

Gloxinia speciosa, also known as Sinningia speciosa, belongs to the Gesneriaceae family and is native to Brazil. Since the 19th century, this tuberous and frost-sensitive perennial plant has given rise to numerous cultivars that have become exceptional indoor plants. The 'Kaiser Wilhelm' cultivar produces plants that do not exceed 30 to 35cm (12 to 14in) in all directions. The flowers, resembling large velvety bells, appear during spring and bloom throughout summer. They appear in the axils of the leaves, carried by short peduncles. They can reach 8cm (3in) in diameter. The flowers are dark violet, extensively marginated with white, blooming around a dark, almost black, lightly speckled throat. The foliage consists of large, wide, fleshy, and velvety dark green leaves. Their veins are visible and their edges are crenate. Oval to oblong in shape, they dry up in autumn and disappear with the arrival of cool temperatures. Only the round and flattened tubercles persist in the soil, which should be kept dry until the start of vegetation in spring.

 

Gloxinias are stunning indoor plants. They are sturdy and easy to overwinter in a dry environment. Few plants can claim such a theatrical appearance, and it is sometimes difficult, if not impossible, to place them with other plants. They are stunning in flower boxes and on windowsills, protected from direct sunlight. They are perfect for replacing geraniums where there is a lack of sunlight.

Gloxinia speciosa Kaiser Wilhelm in pictures

Gloxinia speciosa Kaiser Wilhelm (Flowering) Flowering

Plant habit

Height at maturity 25 cm
Spread at maturity 35 cm
Growth rate fast

Flowering

Flower colour two-tone
Flowering time June to September
Inflorescence Solitary
Flower size 8 cm

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Botanical data

Genus

Gloxinia

Species

speciosa

Cultivar

Kaiser Wilhelm

Family

Gesneriaceae

Other common names

Florist's Gloxinia, Painted tongue, Showy Gloxinia, Brazilian Gloxinia

Origin

Cultivar or hybrid

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Planting and care

Gloxinia 'Kaiser Wilhelm' is a frost-sensitive plant. It thrives at an ideal temperature of around 21°C (69.8°F) in summer, which is why it is easy to grow indoors. This same temperature should be provided in spring for growth to resume. 

You can take it outside as soon as it is warm enough. It is sensitive to high temperatures that dry out the atmosphere. It needs light to flourish, without being exposed to direct sunlight, especially in summer. This plant likes humid atmospheres and partial shade. If you cultivate this plant indoors, it is useful to spray water on the leaves (not the flowers, as this would be damaging) or place it on a bed of clay balls or stones in a tray filled with water.

Water twice a week or more during flowering, then gradually decrease watering before stopping completely when the foliage disappears and the rhizome enters dormancy. Weekly fertilisation with the watering water is beneficial in summer to support flowering.

When the aboveground parts have withered, store the pot in a dry and warm place (15°C (59°F)) until the following spring, when you will repot it in rich and light potting soil.

Planting period

Best planting time April
Recommended planting time April to June

Intended location

Type of use Container, Greenhouse, Conservatory
Hardiness Hardy down to 4°C (USDA zone 11) Show map
Ease of cultivation Amateur
Planting density 15 per m2
Exposure Partial shade
Soil pH Neutral
Soil moisture Moist soil, well-draining, rich

Care

Pruning instructions Remove the faded flowers regularly.
Pruning Pruning recommended once a year
Pruning time June to August
Soil moisture Moist soil
Disease resistance Good
Overwinter Needs to be stored

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