Cut flower
Dahlia
Dahlia × hybrida
Tubers throw blooms from July till frost — pick weekly and they keep coming.
Full sun
Regular
Rich, well-drained
Medium
Yes
Ornamental
Perennial
Half-hardy
10 L
25 cm
Flower
Zinnia
Both attract hoverflies and parasitic wasps that control dahlia pests like thrips and spider mites without competing for water.
Flower
Cosmos
Cosmos attracts hoverflies that control aphids threatening dahlias, while both share similar water and sunlight needs.
Flower
Marigold
Marigolds repel spider mites and aphids that commonly infest dahlias while their peppery scent masks dahlia presence from pests.
Situations where this plant is a reliable fit — from someone's kitchen sill to a wind-blown rooftop.
7 days
Warm water hold
Focal
Yes
Cut at
Cut when fully open — dahlias don't open further once cut.
Honest note
Cutting MAKES the plant bloom more — never let dahlias go to seed.
Where to source
Get growing in United Kingdom
Shop local first
The best plants come from a real nursery, and the best trowel comes from the old-fashioned ironmonger down the road — people who know their stock and can advise. Try local first, both for the plant and the kit. It keeps small growers and small hardware shops alive.
Searching near London
For pots, compost, seed trays, twine and other kit — Amazon has the essentials if the local option isn't right. Not a plant nursery; use the local map above for the plant itself.
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