How to Grow and Care for Red Hot Poker (Torch Lily)

Kniphofia spp.

When you’re looking for dramatic color with a tropical touch, red hot poker plants should be a top contender!

Handsome and low maintenance, red hot poker provides upright structural interest, lush clusters of strappy foliage, and blazing flower racemes in rich shades of apricot, chartreuse, cream, orange, red, yellow, plus bicolors.

Also known as torch lily or tritoma, the species and hybrids of the Kniphofia genus are hardy rhizomatous perennials, evergreen or semi-evergreen plants with a long flowering time.

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The tall torch-like flowers consist of rows of tubular, nectar-rich blooms that attract a wide range of pollinators such as bees, butterflies, and hummingbirds.

They also offer good deer and rabbit resistance as well as heat and drought tolerance when established, making them an active and durable choice for a range of settings, including poor soil and waterwise conditions.

Are you ready to learn more about these striking, easy-care plants? Then let’s root out the details about how to grow and care for red hot poker!

Here’s a peek at what’s ahead:

From the mountainous slopes and sunny meadows of Africa, the commercial breeding of Kniphofia began in the mid-19^th century.

Most of today’s red hot poker cultivars are a cross between K. uvaria and other species such as K. bruceae, K. galpinii, and K. pauciflora.

The bright, bold blooms typically open bottom to top and flower for several weeks from late spring to mid or late summer, with some varieties flowering into early fall.

Flowers are held high above the narrow, arching leaves that grow in clusters from basal rosettes with the long, grass-like foliage remaining evergreen in frost-free winters.

These sun-loving, easy care plants give a sizzling tropical look but are quite hardy and suitable for growth in USDA Zones 5 to 9.

Their durable, sturdy structure requires no staking and the mounds of fiery flowers are ideal as a focal point or in mixed beds.

Red hot poker sizes vary depending on the cultivar but range from 16 to 70 inches tall with a spread of 12 to 36 inches.

They’re a natural for creating tropical-themed borders or poolside beds when grown with other tropicals such as banana, canna lily, coleus, dracaena, elephant ears, hibiscus, and lantana.

Red hot poker features well in cottage, cutting, pollinator, and water-wise gardens. They also have good salt tolerance, making them a smart choice for coastal landscapes.

How to Grow

Red hot pokers do well in a variety of climates including those with abundant rainfall, dry conditions, or high humidity.

Plants should be protected from strong winds to keep the foliage healthy and to prevent flower stakes from being knocked over.

Red hot poker is a low maintenance plant that does well in lean soils and can tolerate periods of drought but for the most striking displays of fiery flowers, optimal conditions are best.

Light

Soil

Although red hot pokers are adaptable to a range of soils, they perform best in moderately rich loam with a slightly acidic to slightly alkaline pH of 6.0 to 7.5.

Before planting, enrich the site with compost, well-rotted manure, or worm castings.

Make sure the growing medium is well-draining as red hot poker is intolerant of wet, heavy soil – it’s the leading cause of root rot.

To improve drainage, mix in one to two parts of gritty materials such as pea gravel, perlite, crushed shells, or stone chips.

For container plantings, use a high quality all-purpose potting mix or make your own by blending together the following:

• Two parts garden soil.
• One part compost, manure, or worm castings.
• One part grit such as pea gravel, crushed shells, or stone chips.

You can also mix in one or two tablespoons of bone meal or a slow-release, balanced fertilizer such as 5-5-5 NPK.

Water

Established red hot poker plants can survive periods of drought but won’t thrive in areas that are permanently dry.

For the showiest flowers, water regularly. Provide one inch of water per week or when the top two inches of soil dries out.

Container-grown red hot poker plants typically dry out faster and may need more frequent water applications, particularly in hot weather.

Temperature and Humidity

Red hot pokers grow best in moderate to warm temperatures in the range of 60 to 90°F and perform equally well in arid conditions or high humidity.

Fertilizing

Kniphofia plants are moderate feeders and require little additional fertilizing if planted in organically-rich, fertile soil.

In spring after new growth emerges, established specimens benefit from a two-inch side dressing of compost, manure, or worm castings to the root zone, working it in gently with a hand fork.

If desired, you can also apply a slow-release fertilizer in spring to enhance flowering and promote vigor. Use a balanced, all-purpose feed with equal parts NPK such as 5-5-5.

Enhanced All Purpose Plant Food

I use Burpee Enhanced All Purpose Plant Food as it’s suitable for a variety of different species in the garden.

You can find it available at Burpee.

Cultivars to Select

With numerous cultivars to choose from, here’s a short list of some popular options.

Alcazar

Dramatic as a Moorish fortress, ‘Alcazar’ features sturdy bronze flower stems and large racemes of tubular apricot flowers – darkest when in bud then lightening in hue as the blooms open and mature.

Flowering from early to late summer, plants grow 36 to 48 inches tall with a spread of up to 36 inches.

‘Alcazar’

A reliable choice for perennial borders, naturalized settings, or as a striking specimen in gravel, rock, and waterwise gardens. Hardy in Zones 6 to 9.

Bare roots in packs of two, four, or six are available at Eden Brothers.

Fire Dance

Glowing like hot coals, ‘Fire Dance’ is a compact variety that’s ideal for lighting up smaller spaces, producing an abundance of brightly colored flowers from early to late summer.

The eye-catching, bicolored blooms are lemon yellow at the base and transition to bright coral red from the mid-section to the top.

‘Fire Dance’

‘Fire Dance’ is a good choice for mixed borders, planters, and rockeries, growing in dense clumps of up to 20 inches tall with a spread of 24 inches. Hardy in Zones 4 to 9.

Bare root plants are available at Burpee.

Pineapple Popsicle

Cool and creamy, ‘Pineapple Popsicle’ is a delightful miniature cultivar boasting multitudes of chartreuse to lemon yellow buds that change to cream and butter yellow as the blooms open and age.

Flowering from midsummer to mid-autumn in mild climates, ‘Pineapple Popsicle’ makes an ideal choice for borders, containers, naturalized settings, and gravel or rock gardens.

‘Pineapple Popsicle’

The handsome clumps grow 15 to 18 inches tall with a width of 18 to 24 inches. Hardy in Zones 6 to 9.

Plants in one-gallon containers are available at Nature Hills Nursery.

Maintenance

Red hot poker plants are pretty independent once established, but some annual trimming and upkeep helps them to look their best.

Throughout the flowering season, deadhead spent blooms by cutting the flower spikes close to the base.

Deadheading maintains a tidy appearance, encourages reblooming, and curtails unwanted self-seeding.

In regions with mild winters, red hot poker plants are typically evergreen and benefit from a spring cleanup.

Use clean, sharp garden shears to remove dead or dry foliage then cut all stems to three or four inches above the ground to promote new growth.

At the cooler end of their hardness range, they are deciduous, losing their leaves over the winter months. In spring, use snips to clean away all dead foliage, cutting just above the soil line.

Propagation

Although species plants can be grown from seed, it takes two or three years for flowers and the seeds must be fresh – older seeds germinate sporadically, if they sprout at all.

Seeds collected from cultivated varieties typically won’t grow true to the parent plant.

Instead, a more reliable way to quickly produce flowering plants is through division.

Here’s how:

1. In spring, use a clean, sharp spade to dig and lift the entire clump.
2. Use the spade or a sharp knife to slice through the rootball, dividing it into equal pieces. Avoid using a saw as they tend to shred the fibrous rhizomes.
3. Ensure each section has growing tips at the crown.

Replant one section in its original location and transplant the remainder where needed.

Transplanting

To transplant, loosen the soil to a width and depth twice that of the rootball.

Mix in organic matter such as compost, manure, or worm castings to enrich the soil.

Add in some grit to improve drainage. Materials such as pea gravel, or stone chips provide a gritty, well-draining texture.

Mix in a tablespoon or two of bone meal or a balanced, slow release fertilizer such as 5-5-5 NPK.

Plant the crown about one inch below the soil surface.

Backfill with amended soil and firm gently in place. Water to settle. 

Pests and Disease

Robust and hardy, torch lilies have few problems when grown in ideal conditions.

Slugs and snails are the most common pests you’ll have to contend with, showing up at night to munch on tender new foliage.

Fiery Finery

With their stately, torch-like flowers, lush, strappy foliage, and easy care, red hot poker plants are ideal perennials for adding color, height, and structure to a variety of settings.

Plant in full sun with enriched soil for a full floral display and ensure the growing site is well-draining to avoid issues like crown and root rot.

And although they’re drought tolerant once established, regular water applications keep them looking their best.

Deadhead after flowering to encourage new blooms, and tidy and trim plants in spring to promote new growth.

Then apply a spring topdressing of organic materials or fertilize with a slow-release formula for verdant, vibrant plants that last well into autumn.

Do you folks have a favorite site to show off the fiery finery of red hot poker? Tell us about it in the comments section below.

And if you’re looking for more ideas for drought resistant, brightly colored perennial flowers, be sure to add the following guides to your reading list next:

• How to Plant and Grow Blazing Star Flowers (Liatris Spicata)
• How to Grow and Care for Coneflowers, A Native American Favorite
• How to Grow and Care for Gaillardia (Blanket Flowers)