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Bishy Barnabees Cottage Garden

Dahlia Cactus Mixed Colours

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It's official, dahlias are addictive! Grow some this year and you'll be hooked forever more. These cactus types are incredibly eye-catching, with a mix of vibrant, colourful flowers and narrow, spiky-looking petals appearing like beautiful sea urchins!

Their hardiness makes them an excellent choice for gardeners of all levels, while their unique beauty makes them showstoppers in any garden space. Indulge your green thumb and add a dahlia cactus to your garden today!

Seed Quantity 40 Seeds

Type Annual

Genus Dahlia variabilis

Sow Seeds Sow under cover in April.  Sow the seeds onto the compost surface and cover them with a layer of vermiculite.  Cover the seed trays with a clear plastic bag until the seedlings are visible and do not allow them to dry out.  Germination 10-14 days

Plant Out They'll be ready to plant out around May and with any luck, you will have flowers from late July to November.

Flowers July-November

Height & Spread 60cm high x 30cm spread

Dahlia Cactus

RHS Plants for Pollinators.

The RHS Plants for Pollinators mark is only given to plants that support pollinating insects.

Find out more at


    Bright yellow cactus dahlia visited by a pollinating bee
    Cactus dahlia displaying white and yellow hues with a backdrop of red petals
    Vibrant cactus dahlia with crimson petals and a golden core
    Mixed cactus dahlia collection attracting pollinators
    Cactus dahlia with white petals and a golden center blooming in a garden
    Garden scene featuring a cactus dahlia with white blooms and a hint of green at the center
    Cluster of white cactus dahlias showcasing their sunny yellow centers
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