Dahlia ‘Firewheel’ Tuber | Bright Red Cactus Dahlia

Bring fiery colour and dramatic texture to the garden with Dahlia ‘Firewheel’, a cactus dahlia producing striking, star-shaped flowers in vivid red tones.

Its narrow, quilled petals taper into pointed tips, creating a spiky flower form reminiscent of radiating flames. The bold colouring and distinctive shape make ‘Firewheel’ an impressive feature variety for garden beds and cut-flower arrangements.

EXAMPLE IMAGE ONLY: The flower image shows an example of the expected mature bloom. The intensity of the red colouring may vary naturally according to climate, growing conditions, lighting and bloom maturity. The supplied product is a dormant tuber—not a flowering plant.

Flower Characteristics

• Bright, vivid red colouring
• Cactus dahlia flower form
• Narrow, quilled petals
• Distinctive pointed petal tips
• Large, star-shaped blooms
• Fiery, radiating appearance
• Strong garden presence
• Excellent for display and cutting

Supplied as Dormant Tubers

Supplied as the selected quantity of dormant Dahlia ‘Firewheel’ tubers.

Dahlia tubers naturally vary in size, shape and appearance. A smaller tuber can grow just as successfully as a larger tuber when it is healthy and has a viable eye or growing point.

Tubers may arrive without visible shoots or roots. This is normal while they are dormant.

Key Features

• Named Dahlia ‘Firewheel’
• Bright red cactus dahlia
• Large, spiky flowers
• Narrow and pointed petals
• Distinctive star-shaped flower form
• Grows approximately 1–1.2m tall
• Flowers from summer into autumn
• Excellent cut-flower variety
• Suitable for garden beds and large containers
• Creates strong contrast in mixed plantings
• Frost-tender tuberous perennial
• Supplied as dormant tubers

Suitable Uses

• Cottage gardens
• Red and warm-toned garden displays
• Mixed flower borders
• Feature planting
• Cut-flower gardens
• Bouquets and floral arrangements
• Large pots and containers
• Seasonal summer displays
• Cactus dahlia collections
• Bold tropical-style planting schemes

Planting Instructions

Plant Dahlia ‘Firewheel’ during spring once the danger of frost has passed and the soil has begun to warm.

Choose a sunny position with fertile, free-draining soil. Avoid low-lying areas where water collects, as dormant tubers can rot when planted in continually wet soil.

Lay each tuber horizontally approximately 5–10cm below the soil surface, with the crown or growing point facing upwards. Cover gently with soil.

Space plants approximately 60cm apart to provide adequate room for growth and good airflow.

Install a sturdy stake at planting time. Adding support before growth begins helps prevent accidental damage to the tuber later.

Avoid heavy watering immediately after planting. If the soil is already moist, wait until shoots begin appearing before commencing regular watering.

Care Instructions

Position

Grow Dahlia ‘Firewheel’ in full sun, ideally with at least six hours of direct sunlight each day.

In hot Australian climates, protection from intense late-afternoon sun may help reduce heat stress and preserve flower quality.

Insufficient sunlight can produce weaker stems and fewer flowers.

Soil

Plant in fertile, humus-rich and free-draining soil.

Improve the planting area with compost or well-aged organic matter before planting. Heavy clay soil should be amended to improve drainage, or the tuber can be grown in a raised garden bed or large container.

Excellent drainage is particularly important in subtropical climates and areas receiving heavy summer rainfall.

Watering

Once shoots emerge, water deeply and regularly while allowing the upper soil surface to begin drying between applications.

Increase watering during hot, dry or windy weather. Avoid keeping the soil continually saturated, particularly around the crown and tuber.

Water near the base of the plant where possible to reduce prolonged moisture on the foliage and flowers.

Feeding

Apply a balanced or flowering-plant fertiliser once active growth is established.

Avoid excessive nitrogen, which can encourage abundant foliage at the expense of flower production. Additional flowering fertiliser may be applied as buds begin developing, following the product label directions.

Staking

Dahlia ‘Firewheel’ generally grows approximately 1–1.2m tall and should be supported, particularly in windy or exposed positions.

Install a sturdy stake at planting time and secure the stems loosely as the plant grows. Allow enough space for natural movement and stem expansion.

Pinching

For bushier growth and additional flowering stems, pinch out the central growing tip once the young plant has developed approximately four sets of leaves.

Pinching may delay the first flowers slightly but can encourage a fuller plant with more flowering branches.

Deadheading and Cutting

Remove faded flowers regularly to encourage continued blooming and prevent the plant from directing energy into seed production.

Flowers intended for arrangements are best cut during the cooler part of the morning. Place the stems into clean water promptly after cutting.

Regular cutting and deadheading can help extend the flowering season.

Hot and Humid Climates

In subtropical and humid regions, provide excellent drainage and generous spacing between plants.

Good airflow helps reduce the risk of fungal problems. Avoid continually wet foliage and water early enough for the leaves to dry before evening.

Protection from the hottest afternoon sun may help preserve flower quality during periods of extreme heat.

End-of-Season Care

After flowering, allow the foliage to remain until it begins yellowing and dying back naturally. This enables the plant to return energy to its tuber.

In mild climates with free-draining soil, the tuber may be left in the ground during dormancy. Mark the planting position and keep the area relatively dry.

In cold, frost-prone or persistently wet climates, lift the tuber after the foliage has died back. Allow it to dry before storing it in a cool, dark, frost-free and well-ventilated location.

Product Details

Botanical Name: Dahlia hybrid ‘Firewheel’
Cultivar: ‘Firewheel’
Common Name: Dahlia
Family: Asteraceae
Flower Classification: Cactus dahlia
Flower Colour: Bright red
Flower Size: Large; final size varies with growing conditions
Plant Height: Approximately 1–1.2m
Flowering Period: Summer to autumn
Plant Type: Frost-tender tuberous perennial
Supply Format: Dormant tuber
Position: Full sun to light afternoon shade
Soil: Fertile, humus-rich and free-draining
Planting Depth: Approximately 5–10cm
Plant Spacing: Approximately 60cm
Water Needs: Moderate during active growth
Frost Tolerance: Frost sensitive
End Use: Garden display, large containers and cut flowers

Important Information

• This variety is commonly sold as Dahlia ‘Firewheel’
• The supplied product is a dormant tuber, not a flowering plant
• Tuber size and shape will vary naturally
• Tubers may arrive without visible shoots or roots
• Plant only when local growing conditions are suitable
• Avoid overwatering before shoots appear
• Mature height and flowering time will vary with climate and care
• Flower colour intensity may vary naturally
• Cactus-style petal shape may vary slightly between individual blooms
• Example images show the expected mature flowers only

FAQ

What colour are Dahlia ‘Firewheel’ flowers?

The flowers are vivid red, creating a bright and dramatic display. Colour intensity may vary slightly with climate, sunlight and bloom maturity.

What flower form does ‘Firewheel’ produce?

‘Firewheel’ is a cactus dahlia with narrow, quilled petals that taper into pointed tips, creating a spiky, star-shaped flower.

How large are Dahlia ‘Firewheel’ flowers?

‘Firewheel’ produces large flowers. Final bloom size will depend on growing conditions, feeding, water availability and plant maturity.

How tall does Dahlia ‘Firewheel’ grow?

Plants generally grow approximately 1–1.2m tall. Final height will depend on climate, position, soil and care.

Will the tuber arrive flowering?

No. This product is supplied as a dormant tuber. The flower photograph is an example of the expected mature bloom only.

When should I plant the tuber?

Plant during spring once the danger of frost has passed and the soil has warmed. In subtropical regions, plant during the locally suitable dahlia-growing season and provide excellent drainage.

Does Dahlia ‘Firewheel’ require staking?

Staking is recommended because the plant can grow up to approximately 1.2m tall and produce substantial flowers. Install the stake when planting to avoid damaging the tuber later.

Can Dahlia ‘Firewheel’ be grown in a container?

Yes. Use a large, stable container with drainage holes and a fertile, free-draining potting mix. Container-grown plants require regular watering, feeding and support.dahlia