Dahlia ‘Mountain Aurora’ Tuber | Yellow and Red-Pink Cactus Dahlia

Create a vibrant summer display with Dahlia ‘Mountain Aurora’, a distinctive cactus dahlia producing spiky, bicoloured flowers.

Each bloom opens with a glowing golden-yellow centre that gradually blends through orange or peach before reaching vibrant red-pink to dark pink petal tips. The long, narrow petals give the flowers their characteristic cactus form and create excellent colour and texture in garden displays.

Growing approximately 1.2–1.5m tall, ‘Mountain Aurora’ is an impressive choice for sunny garden beds, mixed borders and cut-flower arrangements.

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

Flower Characteristics

• Glowing golden-yellow centre
• Yellow petals blending through orange or peach
• Vibrant red-pink to dark pink petal tips
• Distinctive bicoloured appearance
• Small cactus-type flower classification
• Long, narrow and pointed petals
• Spiky, star-like flower form
• Excellent for garden display and cutting

Supplied as Dormant Tubers

Supplied as the selected quantity of dormant Dahlia ‘Mountain Aurora’ 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 ‘Mountain Aurora’
• Small cactus-type dahlia
• Golden-yellow centre
• Orange, peach, red and pink colour transitions
• Narrow, pointed and gently quilled petals
• Strong bicoloured appearance
• Grows approximately 1.2–1.5m tall
• Flowers throughout summer and autumn
• Excellent cut-flower variety
• Suitable for sunny garden beds and large containers
• Frost-tender tuberous perennial
• Supplied as dormant tubers

Suitable Uses

• Cottage gardens
• Mixed flower borders
• Feature planting
• Yellow, orange and pink garden displays
• Cactus dahlia collections
• Cut-flower gardens
• Bouquets and floral arrangements
• Large pots and containers
• Seasonal summer displays
• Bright tropical-inspired colour schemes
• Dahlia collections

Planting Instructions

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

In many Australian climates, suitable planting time falls between September and December. Always adjust planting time according to local temperatures and frost conditions.

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

Lay each tuber horizontally approximately 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 emerging before commencing regular watering.

Care Instructions

Position

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

Light afternoon shade can be beneficial in particularly hot Australian climates. Excessive shade may result in softer stems, weaker growth and fewer flowers.

Choose a position protected from strong winds wherever possible.

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 experiencing heavy summer rainfall.

Watering

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

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

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

Dahlias require consistent moisture during active growth and should not be treated as extremely low-water plants.

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 when buds begin developing, following the product label directions.

Staking

Dahlia ‘Mountain Aurora’ grows approximately 1.2–1.5m tall and should be supported, particularly in windy or exposed gardens.

Install a sturdy stake at planting time and secure the stems loosely as the plant grows. Allow enough room 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 or five 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 period.

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 intense late-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 tubers.

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

Established clumps should be lifted and divided periodically to prevent overcrowding and maintain vigorous growth.

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

Product Details

Botanical Name: Dahlia hybrid ‘Mountain Aurora’
Cultivar: ‘Mountain Aurora’
Common Name: Dahlia
Family: Asteraceae
Flower Classification: Small cactus dahlia
Flower Colour: Golden yellow blending through orange or peach to red-pink tips
Flower Size: Small cactus classification; final size varies with growing conditions
Plant Height: Approximately 1.2–1.5m
Flowering Period: Summer to autumn; commonly December to April under suitable Australian conditions
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 10cm
Plant Spacing: Approximately 60cm
Water Needs: Regular moisture during active growth
Frost Tolerance: Frost sensitive
End Use: Garden display, large containers and cut flowers

Important Information

• The supplied product is a dormant tuber, not a flowering plant
• Tuber size, shape and appearance will vary naturally
• Tubers may arrive without visible shoots or roots
• Plant only when local growing conditions are suitable
• Avoid overwatering before shoots emerge
• Mature height and flowering time will vary with climate and care
• Flower colour and colour placement will vary naturally
• Petal tips may appear red, red-pink or dark pink
• The transition between colours may include orange or peach tones
• Regular watering is required during active growth and flowering
• Example images show the expected mature flowers only

FAQ

What colour are Dahlia ‘Mountain Aurora’ flowers?

The flowers have glowing golden-yellow centres that blend through orange or peach before reaching vibrant red-pink to dark pink tips.

What flower form does ‘Mountain Aurora’ produce?

‘Mountain Aurora’ is classified as a small cactus dahlia. Its long, narrow and pointed petals create a distinctive spiky flower form.

Will every flower have identical colouring?

No. The intensity and placement of the yellow, orange, red and pink tones may vary between flowers. Climate, sunlight, temperature and flower maturity can also affect their appearance.

How tall does Dahlia ‘Mountain Aurora’ grow?

Plants generally reach approximately 1.2–1.5m tall under suitable conditions. 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 shows an example of the expected mature bloom only.

Does Dahlia ‘Mountain Aurora’ require staking?

Yes. Staking is recommended because the plant can grow up to approximately 1.5m tall. Install the stake when planting to avoid damaging the tuber later.

Can it be grown in a container?

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

Is Dahlia ‘Mountain Aurora’ water-wise?

It can tolerate short dry periods once established, but reliable flowering requires consistent moisture during active growth. It should not be treated as an extremely low-water plant.