Dahlias are half hardy, so keep them protected from frost. Pot tubers individually between February and April and grow them on in a greenhouse or bright indoor position. Alternatively, start them outside in May, once the risk of frost has passed.
Out of season
Deluxe
Dahlia
'Bumble Rumble'
Bring in the bees with Dahlia 'Bumble Rumble'! With those open, golden yellow, nectar-rich centres, it’s an absolute pollinator magnet. This fun, pretty and prolific variety is bound to make you smile with its cheerful good looks and bright, optimistic colouring. A collarette dahlia with a striking colour palette, Dahlia 'Bumble Rumble' has intense raspberry streaks on white outer petals, with a ruffled set of white inner petals flecked with rose-pink. A strong and bushy plant, it holds up the flowers tall and proud on straight stems, giving them maximum visibility. It’s a sure-fire way to brighten up the garden and patio and a feast for bees and butterflies.
Understandably popular, Dahlia 'Bumble Rumble' looks fabulous in a flower border, where it injects plenty of colour and interest, as well as creating quite a buzz among the bees. Flowering from mid summer until well into autumn, it freely produces plenty of blooms on a bushy, leafy plant. It also makes a superb cut flower, looking fresh and lovely in a vase. At a medium height of around 90cm, it’s easy to combine with other plants. You could try mixing it with vibrant pinks, or more pastel hues – it works well with both. Or plant Dahlia 'Bumble Rumble' in a pollinator-friendly mix with other late-season flowers like Japanese anemones, asters, echinacea and salvias and keep the bees stocked up through to the end of autumn!
Quantity
Plant profile
Plant calendar
For planting out later, use a snug-fitting 15–20cm pot filled with peat-free multipurpose compost. For a patio display, plant directly into a container at least 30cm wide and keep it somewhere bright and frost free until it can move outdoors.
Position the old stem facing upwards, with the tubers covered and the stem stump level with the compost. Tubers naturally vary in size and shape and may arrive without visible buds. Bent necks are usually fine if they remain firmly attached, so do not remove them.
Water after planting, then allow the compost to become almost dry before watering again while the tuber remains dormant. Once shoots and leaves are growing strongly, water more regularly, always allowing excess water to drain away.
Plant out after the last frost, once the plant is around 20–30cm tall and its roots hold the compost together. Space dahlias approximately 30–50cm apart in borders, allowing less room for compact varieties. Water thoroughly after planting.
Water regularly during active growth and deadhead or cut flowers often. Dahlias usually bloom from July or August until the first frost, although later-planted tubers may start in late August or September. In autumn, lift, clean and dry the tubers, then store them somewhere cool, dry, airy and frost free.
- Botanical name
- Dahlia 'Bumble Rumble'
- Flower colour
- Magenta, pink, white
- Tuber size
- 1
- Established height
- 50-70cm
- Established spread
- 30-50cm
- Growing skill
- Easy to grow
- Habit
- Upright
- Hardiness
- Half hardy
- Leaf colour
- Green
- Mouse resistant
- No
- Plant spacing
- 5 tubers per m2
- Pollinator friendly
- Yes
- Position
- Sheltered
- Rabbit resistant
- No
- Scented
- No
- Soil acidity
- Any
- Soil moisture
- Free draining
- Soil type
-
Loam
Sandy
Multipurpose compost
Loam-based compost - Suitable for
-
Large containers
Borders
Gravel gardens
Coastal gardens
Cottage gardens
Low maintenance gardens
Cut flower Gardens
Wildlife gardens - Sunlight
-
Full sun
Partial shade - Toxicity
- No report
- Years to establish
- 1st year
Good for cutting
Thrives in full sun
Perennial
Packed in paper
Low maintenance
Top-size tubers
-20%
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