Striking Purple Globe Flowers for an Architectural Garden Display

Create a dramatic and elegant outdoor display with Allium Dallas – Pack of 25 Bulbs. This attractive ornamental allium variety produces tall flowering stems topped with impressive, globe-shaped purple flower heads, bringing beautiful colour, architectural structure and striking vertical interest to garden borders, flower beds and decorative outdoor containers.

Allium Dallas is an eye-catching spring-flowering ornamental bulb, admired for its distinctive spherical blooms and elegant upright growth habit. The rounded flower heads create an attractive architectural feature, making this variety an excellent choice for gardeners looking to introduce bold structure and visual impact into their outdoor planting arrangements.

The beautiful purple flowers provide a striking contrast against green foliage and complementary flowering plants. Their distinctive globe-shaped appearance adds depth, texture and decorative interest to both traditional and contemporary garden designs.

Perfect for gardeners who appreciate unusual flower forms and architectural planting schemes, Allium Dallas combines ornamental beauty with a dramatic seasonal appearance.

One of the most appealing characteristics of this variety is its ability to introduce height into garden borders and flower beds. The tall flowering stems rise above surrounding plants, creating an attractive layered effect and helping to establish strong focal points throughout the garden.

Whether planted in coordinated groups or incorporated into mixed perennial borders, Allium Dallas creates an elegant display that enhances the appearance of outdoor spaces.

For a particularly impressive garden arrangement, plant several bulbs together in sunny borders. The distinctive purple flower globes create an attractive display, especially when combined with lower-growing ornamental plants and decorative foliage.

With 25 bulbs per pack, Allium Dallas offers an excellent opportunity to create coordinated planting arrangements across larger garden borders, flower beds or multiple outdoor containers.

These ornamental alliums can also be grown in sufficiently large patio containers with good drainage, making them a suitable choice for decorating sunny patios, terraces and garden entrances.

The purple flowers work beautifully alongside white flowering perennials, silver-toned foliage and ornamental grasses, creating elegant contrasting planting schemes that highlight their architectural form.

Allium flowers can attract visiting bees and other pollinating insects, making these ornamental bulbs an attractive addition to pollinator-friendly garden planting arrangements.

The distinctive globe-shaped flower heads may also be used in cut flower arrangements, bringing structure and decorative interest to seasonal floral displays. After flowering, the developing seed heads can provide further architectural appeal.

Easy to grow and suitable for beginners and experienced gardeners, Allium Dallas thrives in well-drained soil in a sunny position. Once established, ornamental alliums generally require relatively little maintenance.

As a perennial ornamental bulb, Allium Dallas may establish and flower again in subsequent years when grown in suitable conditions. Good drainage and appropriate seasonal care help support healthy bulb development.

Each pack contains 25 Allium Dallas bulbs, ideal for creating dramatic garden borders, striking architectural planting arrangements and beautifully coordinated seasonal flower displays.

Why Choose Allium Dallas?

Striking Purple Globe Flowers: Produces attractive rounded purple flower heads that bring bold seasonal colour and decorative interest to garden displays.

Architectural Garden Appeal: The distinctive spherical blooms introduce beautiful structure and visual impact to outdoor planting arrangements.

Tall Flowering Stems: Adds vertical interest and creates attractive focal points amongst lower-growing ornamental plants.

Pack of 25 Bulbs: A generous quantity for creating coordinated group plantings, larger garden displays and multiple container arrangements.

Beautiful Purple Colour: The rich purple blooms contrast attractively with green foliage and complementary flowering plants.

Perfect for Garden Borders: Creates impressive displays in mixed borders, flower beds and established ornamental planting schemes.

Suitable for Large Patio Containers: Can be grown in sufficiently spacious outdoor pots and planters with excellent drainage.

Excellent for Group Planting: Arrange several bulbs together to create an attractive display of globe-shaped flowers.

Distinctive Flower Form: The rounded flower heads provide an unusual ornamental feature compared with traditional flowering plants.

Pollinator Interest: Allium flowers can attract visiting bees and other pollinating insects during flowering.

Potential for Cut Flower Displays: The architectural flower heads may be suitable for decorative floral arrangements.

Versatile Garden Design: Complements cottage-style gardens, contemporary outdoor spaces and coordinated perennial planting schemes.

Easy to Grow: Suitable for gardeners of all experience levels when planted in appropriate growing conditions.

Perennial Bulb Variety: May establish and flower again in subsequent years when grown in suitable conditions.

Planting & Care Guide

Planting Time: Autumn, typically September to November in the UK, while the soil remains workable and before prolonged freezing conditions.

Flowering Time: Spring to early summer, depending on the variety and local growing conditions. Exact flowering months for Allium Dallas require supplier confirmation.

Position: Full sun.

Soil: Fertile, well-drained soil. Avoid heavy, persistently waterlogged conditions, particularly during winter dormancy.

Planting Depth: As a general guide, plant ornamental allium bulbs at a depth of approximately two to three times their height. For larger allium bulbs, this may be around 15–20 cm, but the correct depth depends on the actual bulb size supplied.

Planting Spacing: Approximately 15–30 cm apart for larger ornamental alliums, adjusted according to the confirmed mature height, spread and bulb size of Allium Dallas.

Watering: Water after planting if the soil is dry. Water moderately during active growth, allowing excess moisture to drain away. Avoid prolonged waterlogging.

Container Growing: Plant in sufficiently large outdoor containers with drainage holes using suitable free-draining compost. Position containers in full sun and allow enough space for the developing stems and flower heads.

Aftercare: Allow foliage to yellow and die back naturally after flowering. Remove faded flower heads if desired, or leave them in place for their decorative appearance.

Group Planting: Arrange bulbs in coordinated clusters or larger groups to create a striking display of purple globe-shaped flowers.

Companion Planting: Combine with ornamental grasses, white flowering perennials, silver-toned foliage or other complementary garden plants.

Cut Flower Care: If using the flowers in arrangements, cut stems when the blooms are opening and place them in fresh water.

Dried Flower Interest: Mature flower heads may be left to dry naturally, providing attractive structural interest in the garden or suitable decorative arrangements.

Repeat Flowering: Ornamental alliums are perennial bulbs that may return in subsequent years when grown in suitable conditions. Flowering performance depends on drainage, weather, bulb health and aftercare.

Perfect For

• Adding height to garden borders and flower beds

• Contemporary and cottage-style gardens

• Architectural and structural garden planting

• Creating dramatic vertical interest

• Large patio pots and outdoor containers

• Purple-themed ornamental garden displays

• Coordinated perennial planting schemes

• Pollinator-friendly garden borders

• Decorative group planting

• Mixed seasonal flower displays

• Planting alongside ornamental grasses and perennials

Product Specifications

Product Name: Allium Dallas

Botanical Name: Allium 'Dallas' – Cultivar Identification Requires Supplier Confirmation

Common Name: Dallas Ornamental Allium / Flowering Onion

Pack Quantity: 25 Bulbs

Flower Colour: Purple

Flower Form: Globe-Shaped Flower Heads

Plant Type: Ornamental Perennial Bulb

Planting Season: Autumn

Flowering Season: Spring to Early Summer – Exact Period Requires Confirmation

Sunlight: Full Sun

Soil Requirements: Well-Drained Soil

Planting Location: Outdoor

Suitable for Containers: Yes, in Appropriately Sized Containers with Good Drainage

Suitable for Borders: Yes

Suitable for Group Planting: Yes

Supplied As: Unplanted Ornamental Allium Bulbs

What's Included?

1 × Pack of 25 Allium Dallas Bulbs

Variety: Dallas

Quantity: 25 Bulbs

Flower Colour: Purple

Flower Type: Globe-Shaped Ornamental Allium

Brand: Plants By Post

Supplied as unplanted bulbs, ready for outdoor planting.

Important Information

These are dormant ornamental flower bulbs, not established or potted plants.

Actual flower colour, flower head size, mature height and flowering time may vary depending on local weather and growing conditions.

The supplier describes Allium Dallas as a tall ornamental allium with large purple globe-shaped flowers. The exact botanical identification, mature height, flower diameter and bulb size have not been independently verified.

Planting depth and spacing should be adjusted to the actual bulb size and confirmed mature growth habit of the supplied variety.

Ornamental alliums are perennial bulbs and may establish and flower again in subsequent years when grown in suitable conditions, although repeat flowering is not guaranteed.

Good drainage is particularly important for ornamental alliums, especially during winter dormancy.

Allium species can be toxic to dogs and cats if ingested. Keep bulbs and plants away from pets and children. Do not consume ornamental bulbs, and wear gardening gloves when handling or planting them.