Kniphofia rooperi - Rooper's Red Hot Poker
Kniphofia rooperi - Rooper's Red Hot Poker
Kniphofia rooperi - Rooper's Red Hot Poker
Kniphofia rooperi - Rooper's Red Hot Poker
Kniphofia rooperi - Rooper's Red Hot Poker
Kniphofia rooperi - Rooper's Red Hot Poker
Kniphofia rooperi
Rooper's Red-hot Poker
The young plant is growing well in volume; it has already flowered several times. Nice in a flower bed near the pool.
Edith, 28/07/2025
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Description
Kniphofia rooperi is a very beautiful species of botanical tritoma, rarely used in gardens. This large evergreen perennial is particularly ornamental and vigorous. The plant produces several robust stems in late summer, exceeding 1.2m (4ft) in height, each carrying a wide, ovoid-shaped spike of a scarlet red colour quickly turning to a bright and soft yellow-orange. The strong rosette of long dark green keeled leaves shows the plant's vigour. This large hardy perennial is undoubtedly one of the most beautiful species to acclimatise in moist, even clayey soil. It is magnificent planted in isolation, or standing out in a naturalistic meadow.
Kniphofia rooperi is a tall perennial native to South Africa, belonging to the Asphodelaceae family. This evergreen plant forms solid rosettes at least 70cm (28in) wide, composed of long deeply keeled leaves with very toothed edges, quite wide at the base, tapering to a beautiful dark green tip. In June, robust floral stems appear above the foliage, often reaching 1.5m (5ft) from the ground. From August to October, the stems bear particularly opulent terminal inflorescences for a tritoma. Its wide ovoid spikes are composed of numerous tubular flowers reaching 4cm (2in) in length. They open in bright red, then turn to yellow-orange, ripening to pale-yellow to green from the base of the spike to the top.
Their exotic appearance charmed our grandmothers. Tritomas are surprising plants, but nevertheless very robust, making them perfect candidates for the gardens of rectories or countryside flower beds where they light up with their colourful torches. Kniphofia rooperi thrives in moist soil, even clayey if properly drained, like some grasses (Calamagrostis brachytricha, Deschampsia cespitosa 'Tardiflora') with which it is magnificent, in a natural or contemporary style. It can also be paired with loosestrifes, ligularias, and eupatoriums, which also appreciate moist soils. It is well highlighted when planted in isolation, or on the edge of a water feature, in contrast to the opulent mass of osmundas or gunneras. Tritomas pair well with perennials with light blooms.
Compared to other varieties, this species takes a little longer to establish and therefore to flower, sometimes requiring a minimum of 2 years of cultivation, or even 3 years, before the first inflorescences are observed.
Kniphofia rooperi - Rooper's Red Hot Poker in pictures
Flowering
Foliage
Plant habit
Botanical data
Kniphofia
rooperi
Asphodelaceae
Rooper's Red-hot Poker
South America
Planting and care
It prefers loamy, sandy and humus-bearing, or marshy soils, which are fertile and moist. In our garden, it thrives in rich, deep, and well-drained clay soil, forming beautiful clumps in late summer. It appears to be more cold-resistant than literature suggests, as it has withstood temperatures around -15°C (5°F) without any issues. Place it in a sunny location to achieve a beautiful flowering in late summer. Clean the rosettes in late winter, removing all dried or rotting leaves that would hinder the growth of new spring shoots. Remove faded flowers at the end of the season.
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).
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 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.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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