Discover the finest giant dahlias

Gain some height

Some Giant Dahlias are impressive in size: their tall stems can reach up to 3 metres in height! They are perfect for structuring a flower bed with their imposing stature or as a focal point in the background of a mixed-border of perennials or in the vegetable garden. They also make magnificent bouquets.

The tallest: Dahlia Imperialis

Also called Tree Dahlia or “Bamboo Dahlia” because its stem resembles that of the latter. This arborescent giant measures between 2 to 4 m and may consequently require staking. It will thrive in sunny and sheltered spots. It flowers a bit later than others, from late August to November. Its pale pink or white flowers, small in size, reach 10 to 15 cm in diameter.

Dahlia Imperialis is an arborescent with impressive growth

Taller than three apples!

Dahlia Blith Spirit

Spectacular in size!

• Flowering time August to December
• Height at maturity 1,50 m

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Dahlia Bohemian Spartacus

Among the tallest!

• Flowering time August to December
• Height at maturity 1,50 m

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Dahlia Otto's Thrill

Its tall silhouette is perfect for structuring flower beds

• Flowering time August to December
• Height at maturity 1,50 m

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The largest flowers

Giant Dahlias are those that bear the largest flowers, they can reach over 25 cm in diameter: some are as big as a dinner plate! This type of dahlia is perfect for brightening up a bed of light perennials, a corner of the vegetable garden or creating generous bouquets. Here’s a small selection of the most enormous flowers.

XXL flower heads

Dahlia Café au Lait

Impressive-sized beige-pink flowers

• Flowering time August to November
• Height at maturity 1,20 m

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Dahlia Kelvin Floodlight

It produces enormous, very double flowers

• Flowering time August to November
• Height at maturity 1 m

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Dahlia Lady Darlene

Giant flowers up to 22 cm in diameter

• Flowering time August to December
• Height at maturity 80 cm

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Dahlia Lady Liberty

One of the most beautiful giant dahlias

• Flowering time August to November
• Height at maturity 1,20 m

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Dahlia Life Force

An exclusive variety with enormous flowers!

• Flowering time August to December
• Height at maturity 1,10 m

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Our favourite varieties

Dahlia Spartacus

Incredible with flowers over 20 cm in a deep red hue.

• Flowering time August to December
• Height at maturity 90 cm

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Dahlia Café au Lait

Enormous flowers in a creamy hue, rare among dahlias.

• Flowering time August to November
• Height at maturity 1,20 m

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Dahlia Myrtle's Folly

Huge frizzy flowers in a peachy orange hue.

• Flowering time August to November
• Height at maturity 1,20 m

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Dahlia Emory Paul

We love its XXL pink pompon flowers.

• Flowering time August to December
• Height at maturity 1,30 m

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Dahlia Gitts Perfection

Enormous flowers in a soft pink gradient.

• Flowering time August to December
• Height at maturity 1,30 m

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Good to know

While these Dahlia varieties are wind-resistant, staking is essential to prevent them from bending under the weight of the flowers.

Disbudding is crucial for obtaining larger flowers – simply remove all flower buds as they appear, keeping only one or two per stem. The resulting flowers can exceed 30 cm in diameter, like the variety ‘Emory Paul’, which produces excellent results. The more fragile stems must be staked very high to support the weight of the flowers.