Discover the best giant dahlias
For vibrant scenes
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Among all dahlias, the Giant Dahlias are among the most spectacular: They bear the largest flowers measuring 15 to 35 cm in diameter, and some have tall stems that can reach up to 2 m in height! Like their most proud representative, the Dahlia imperialis or Bamboo Dahlia.
With their large, full flowers and sometimes impressive height, Giant Dahlias are widely used in the background of flower beds to create an interesting focal point. You are sure to find one that suits you among the more than 30 varieties, some of which are exclusive, that we offer.
Whether you are looking for flower size or stem height, discover their characteristics to make the right choice and find out about the best of the Dahlia ‘Café au Lait’ and the bicolour ‘Myrtle’s Folly.’
Take to the heights
Some Giant Dahlias are impressive due to their size: their tall stems can reach up to 3 m in height! They are perfect for structuring a flowerbed with their imposing stature or to serve as a focal point in the background of a mixed border of perennials or in the vegetable garden. They also make stunning bouquets.
The tallest: Dahlia Imperialis
Also known as Tree Dahlia or “Bamboo Dahlia” because its stem resembles that of the latter. This arborescent giant measures between 2 to 4 m and may therefore require staking. It will thrive in full sun and sheltered from the wind. It blooms slightly later than others, from late August to November. Its pale pink or white flowers, small in size, reach 10 to 15 cm in diameter.
The Dahlia Imperialis is an impressive arborescent plant
Taller than three apples!
Dahlia Blith Spirit
- Flowering time August to December
- Height at maturity 1,50 m
Dahlia Bohemian Spartacus
- Flowering time August to December
- Height at maturity 1,50 m
Dahlia Otto's Thrill
- Flowering time August to December
- Height at maturity 1,50 m
The largest flowers
The Giant Dahlias are those that bear the largest flowers, which can reach over 25 cm in diameter: some are as big as a 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 biggest flowers.
XXL heads
Dahlia Café au Lait
- Flowering time August to November
- Height at maturity 1,20 m
Dahlia Kelvin Floodlight
- Flowering time August to November
- Height at maturity 1 m
Dahlia Lady Darlene
- Flowering time August to December
- Height at maturity 80 cm
Dahlia Lady Liberty
- Flowering time August to November
- Height at maturity 1,20 m
Dahlia Life Force
- Flowering time August to December
- Height at maturity 1,10 m
Discover other Giant Dahlia
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Available in 1 sizes
Available in 1 sizes
Available in 1 sizes
Available in 1 sizes
Available in 1 sizes
Available in 1 sizes
Available in 1 sizes
Available in 1 sizes
Available in 1 sizes
Our favourite varieties
Dahlia Spartacus
- Flowering time August to December
- Height at maturity 90 cm
Dahlia Café au Lait
- Flowering time August to November
- Height at maturity 1,20 m
Dahlia Myrtle's Folly
- Flowering time August to November
- Height at maturity 1,20 m
Dahlia Emory Paul
- Flowering time August to December
- Height at maturity 1,30 m
Dahlia Gitts Perfection
- Flowering time August to December
- Height at maturity 1,30 m
Good to know
If these varieties of Dahlias withstand the wind well, it is necessary to stake them to prevent them from bending under the weight of the flowers.
Pinching is essential to obtain larger flowers; for this, remove all flower buds as they appear, keeping only one or two per stem. The flowers that will develop may, in some cases, exceed 30 cm in diameter, like the variety ‘Emory Paul’, which gives excellent results. The stems, being more fragile, must be staked very high to support the weight of the flowers.
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