Overview
Dahlia 'Rio' (Dalina Series) (Misc) is a bushy, clump-forming, tuberous perennial bedding in the genus Dahlia, part of the Asteraceae family, with green, occasionally dark-leaved foliage. Dahlia 'Rio' (Dalina Series) (Misc) grows best in full sun, and tolerates loam soils and neutral pH. Its UK hardiness is rated H4. Suggested uses include borders, containers and cut flowers.
About
Dahlia 'Rio' (Dalina Series) is a bushy, clump-forming herbaceous perennial belonging to the Dahlia genus, known for its tuberous roots and finely dissected leaves. This cultivar thrives in full sun, ideally in a south-facing, sheltered position with moist but well-drained loam soil of neutral pH. Suitable for borders, containers, and cut flowers, it offers seasonal interest from spring. As a member of the Asteraceae family, it shares the genus's characteristic prominent flowerheads and is hardy to UK zone H4.
About the genus
Dahlias come from the high meadows of Mexico, and somewhere in that heritage is the explanation for how they behave here: tender to frost, hungry, generous beyond all reason. No other plant gives you quite so much for so little. One tuber, planted after the last frost, becomes a shrub's worth of flowers by August — and the more you cut, the more they come.The range is faintly ridiculous. Tight pompoms, spiky cactus types, singles the bees adore, dinner-plates the size of your face. Whatever your garden's mood, there is a dahlia that agrees with it, which is probably why every generation falls out of love with them and then, a decade later, falls straight back in.They're at their best when much of the garden is winding down — late summer into autumn, flowering hard until the first frost calls time. I think of them as the encore. And they always play it.
Written by Henry
Growing conditions
Best soil and position for Dahlia
- Sunlight
- Full sun
- Soil type
- Loam
- Soil pH
- Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- South-facing
- Exposure
- Sheltered
- UK hardiness
- H4
Plant details
Dahlia 'Rio' (Dalina Series) (Misc) size, habit and characteristics
- Plant type
- Bedding, Herbaceous Perennial
- Habit
- Bushy, clump-forming, tuberous perennial
- Foliage
- Green, occasionally dark-leaved
- Suggested uses
- Borders, containers, cut flowers
Care notes
Pruning and caring for Dahlia 'Rio' (Dalina Series) (Misc)
- Propagation
- Division, cuttings, seed
- Pest resistance
- Generally pest-resistant
- Disease resistance
- Generally disease-resistant
Frequently asked questions
Where is the best place to plant Dahlia 'Rio' (Dalina Series) (Misc)?
Dahlia 'Rio' (Dalina Series) (Misc) prefers full sun. It suits sheltered positions.
What soil does Dahlia 'Rio' (Dalina Series) (Misc) need?
Dahlia 'Rio' (Dalina Series) (Misc) grows best in loam soil. It prefers neutral soil. Aim for soil that stays moist but well-drained.
Is Dahlia 'Rio' (Dalina Series) (Misc) hardy in the UK?
Dahlia 'Rio' (Dalina Series) (Misc) has an RHS hardiness rating of H4, meaning it is hardy through an average UK winter, tolerating -10 to -5°C.
How do I propagate Dahlia 'Rio' (Dalina Series) (Misc)?
Division, cuttings, seed.
More in the Dahlia genus
- Dahlia 'Clearview Cameron' (C)

- Dahlia 'Croydon Jumbo' (D)Dahlia

- Dahlia 'Elizabeth Snowden' (Col)

- Dahlia 'Katie's Velvet' (Col)Dahlia

- Dahlia 'LB Michael Braithwaite' (D)

- Dahlia 'Amazing Grace' (Misc)
- Dahlia 'Aurora's Kiss' (Ba)
- Dahlia 'Black Diamond' (Ba)