Overview
Kniphofia praecox is a clump-forming, upright perennial in the genus Kniphofia, part of the Asphodelaceae family, with evergreen or deciduous; narrow, arching, strap-shaped or grassy foliage. Kniphofia praecox grows best in full sun, and tolerates fertile sandy or loamy soil soils and neutral to slightly acid pH. Its UK hardiness is rated H4–H6. It is native to South Africa.
About
Kniphofia praecox is a clump-forming perennial with upright flower spikes that age from scarlet through orange to yellow. It carries narrow, strap-shaped leaves that may be evergreen or deciduous depending on site. Flowering in the UK runs from June to September, making it a summer focal point. The plant favours a sunny, south- or west-facing spot in fertile sandy or loamy soil that holds moisture in summer but drains in winter.
Wikipedia contributors, CC BY-SA 4.0 — Kniphofia × praecox
About the genus
Kniphofia is a genus of perennial flowering plants in the family Asphodelaceae, first described as a genus in 1794. All species of Kniphofia are native to Africa. Common names include tritoma, red hot poker, torch lily and poker plant.
Wikipedia contributors, "Kniphofia", CC BY-SA 4.0 — Kniphofia
In the garden
Kniphofia praecox belongs to the Asphodelaceae and originates from South Africa. It forms upright clumps of narrow, grass-like leaves and produces long, cylindrical flower spikes whose buds open scarlet and mature through orange to yellow. In the UK it flowers from June to September, providing colour through the summer months. Locate it in full sun on a south- or west-facing bank or border where soil is fertile, sandy or loamy and neutral to slightly acid. The soil should retain moisture during the growing season but shed excess water over winter; good winter drainage is important. The plant tolerates exposed as well as sheltered situations and survives across a broad range of UK conditions (H4–H6, average to very hardy). USDA hardiness is 5–9. Use Kniphofia praecox where a tall, vertical element is needed in the summer border or alongside water-tolerant plantings that can supply summer moisture. Leaves may remain evergreen in milder sites or die back in colder spots, so allow for a clump that reads well both with and without foliage. Sit the crown where the flower spikes can be seen at eye level to make the most of their staged colour change from scarlet to yellow.
Growing conditions
Best soil and position for Kniphofia
- Sunlight
- Full sun
- Soil type
- Fertile sandy or loamy soil
- Soil pH
- Neutral to slightly acid
- Soil moisture
- Moisture-retentive in summer, well drained in winter
- Aspect
- South or west facing
- Exposure
- Exposed or sheltered
- UK hardiness
- H4–H6
Plant details
Kniphofia praecox size, habit and characteristics
- Plant type
- Perennial
- Habit
- Clump-forming, upright
- Foliage
- Evergreen or deciduous; narrow, arching, strap-shaped or grassy
- Native to
- South Africa
Care notes
Pruning and caring for Kniphofia praecox
- Cultivation
- What most red hot pokers want is summer moisture combined with winter dryness. Plant on a free-draining site, water generously while the spikes are forming, then protect the crowns of less hardy kinds with a dry mulch or by tying the leaves up over the centre in autumn.
- Pruning
- Remove faded spikes at the base. Cut deciduous foliage down in late autumn; on evergreens pull away dead leaves by hand rather than shearing the whole clump.
- Propagation
- Divide established clumps in late spring — autumn division risks rotting. Species germinate readily from seed but take two to three years to flower.
- Pest resistance
- Usually undemanding, but aphids, thrips, slugs and snails can all take advantage of the crown and new growth.
- Disease resistance
- Healthy in suitable conditions. Crown and root rot follow winter waterlogging.
Frequently asked questions
How do I grow Kniphofia praecox?
What most red hot pokers want is summer moisture combined with winter dryness. Plant on a free-draining site, water generously while the spikes are forming, then protect the crowns of less hardy kinds with a dry mulch or by tying the leaves up over the centre in autumn.
Where is the best place to plant Kniphofia praecox?
Kniphofia praecox prefers full sun. It suits exposed or sheltered positions.
What soil does Kniphofia praecox need?
Kniphofia praecox grows best in fertile sandy or loamy soil soil. It prefers neutral to slightly acid soil. Aim for soil that stays moisture-retentive in summer to well drained in winter.
How do I prune Kniphofia praecox?
Remove faded spikes at the base. Cut deciduous foliage down in late autumn; on evergreens pull away dead leaves by hand rather than shearing the whole clump.
Is Kniphofia praecox hardy in the UK?
Kniphofia praecox has an RHS hardiness rating of H4, meaning it is hardy through an average UK winter, tolerating -10 to -5°C.
How do I propagate Kniphofia praecox?
Divide established clumps in late spring — autumn division risks rotting. Species germinate readily from seed but take two to three years to flower.
More in the Kniphofia genus
- Kniphofia 'Royal Standard'red-hot poker 'Royal Standard'
- Kniphofia gracilisRed Hot Poker
- Kniphofia rufaRed Hot Poker
- Kniphofia triangularisdwarf red-hot poker
- Kniphofia tuckii of gardensRed Hot Poker
- Kniphofia 'Ada'red-hot poker 'Ada'
- Kniphofia 'Erecta'red-hot poker 'Erecta'
- Kniphofia 'Goldelse'red-hot poker 'Goldelse'