Dahlia ‘Purple Jean’ Tuber | Rich Purple Ball Dahlia with Neat Pointed Petals

Fill your summer garden with the rich, jewel-toned colour of Dahlia ‘Purple Jean’.

This striking ball dahlia produces beautifully organised, rounded flowers in deep purple shades. Its tightly arranged, neatly pointed petals create a precise, symmetrical form with impressive depth and texture.

Carried on strong, upright stems, the richly coloured blooms make an elegant addition to garden beds, mixed borders and cut-flower arrangements. The intense purple colouring also pairs beautifully with white, pale pink, mauve and silver-toned plants.

EXAMPLE IMAGE ONLY: The flower image shows an example of the mature bloom. Flower colour, size and form 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

• Rich purple flowers
• Rounded ball dahlia form
• Neatly arranged, pointed petals
• Densely layered flower structure
• Balanced and symmetrical appearance
• Strong, jewel-toned colouring
• Upright flowering stems
• Excellent for garden display and cutting

Supplied as Dormant Tubers

Supplied as the selected quantity of dormant Dahlia ‘Purple Jean’ 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 ‘Purple Jean’
• Rich purple flower colour
• Well-organised ball dahlia form
• Neat, pointed petals
• Dense and symmetrical blooms
• Grows approximately 90–120cm tall
• Flowers from summer into autumn
• Excellent cut-flower variety
• Suitable for beds, borders and large containers
• Complements white, pink and pastel flowers
• Frost-tender tuberous perennial
• Supplied as dormant tubers

Suitable Uses

• Cottage gardens
• Purple and jewel-toned colour schemes
• Mixed flower borders
• Feature planting
• Cut-flower gardens
• Bouquets and floral arrangements
• Large pots and containers
• Seasonal summer displays
• Dahlia collections
• Formal and contemporary gardens

Planting Instructions

Plant Dahlia ‘Purple Jean’ 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 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 50–60cm apart to provide room for growth and good airflow.

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

Care Instructions

Position

Grow 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. Insufficient sunlight can result in weaker stems and reduced flowering.

Soil

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

Enrich the planting area with compost or well-aged organic matter before planting. Heavy clay soil should be improved, or the tubers can be planted in a raised garden bed or large container.

Excellent drainage is particularly important in humid 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 leaving 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.

Feeding

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

Avoid excessive nitrogen, which can encourage lush foliage at the expense of flower production. Apply additional flowering fertiliser when buds begin developing, following the product label directions.

Staking

Dahlia ‘Purple Jean’ generally grows approximately 90–120cm tall and benefits from support, particularly in windy or exposed gardens.

Install a sturdy stake at planting time to avoid damaging the tuber later. Secure the stems loosely as the plant grows, leaving enough room for natural movement and expansion.

Pinching

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

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

Deadheading and Cutting

Remove faded flowers regularly to encourage continued blooming.

Flowers intended for arrangements are best cut during the cooler part of the morning. Choose blooms that are nearly or fully open, as cut dahlias do not continue opening significantly after harvest.

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 intense late-afternoon sun may be beneficial 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, the tubers 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 tubers after the foliage has died back. Allow them to dry before storing them in a cool, dark and well-ventilated location.

Product Details

Botanical Name: Dahlia hybrid ‘Purple Jean’
Cultivar: ‘Purple Jean’
Common Name: Dahlia
Family: Asteraceae
Flower Classification: Ball dahlia
Flower Colour: Rich purple
Flower Form: Rounded, densely layered blooms with neat pointed petals
Plant Height: Approximately 90–120cm
Plant Width: Approximately 60–90cm under suitable conditions
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 50–60cm
Water Needs: Moderate during active growth
Frost Tolerance: Frost sensitive
End Use: Garden display, 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 appear
• Mature height and flowering time will vary with climate and care
• Flower colour may vary slightly under different growing conditions and lighting
• Example images show the expected mature flower only

FAQ

What colour are Dahlia ‘Purple Jean’ flowers?

The flowers are rich purple, although the precise depth and intensity of the colour may vary with lighting, temperature, bloom maturity and growing conditions.

What flower form does ‘Purple Jean’ produce?

‘Purple Jean’ is a ball dahlia. It produces rounded, densely layered flowers with neatly arranged, pointed petals.

How tall does Dahlia ‘Purple Jean’ grow?

Plants generally grow approximately 90–120cm 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 is an example of the mature bloom only.

When should I plant the tuber?

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

Does Dahlia ‘Purple Jean’ require staking?

Staking is recommended because the plant can grow approximately 90–120cm 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 drainage holes and a fertile, free-draining potting mix. Container-grown plants require regular watering, feeding and support.

Is Dahlia ‘Purple Jean’ suitable for cutting?

Yes. Its richly coloured, rounded flowers and upright stems make it an excellent choice for bouquets and floral arrangements.