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
'Purple Haze'
Watch with excitement as the unusual blooms of Dahlia 'Purple Haze' slowly unfurl. This beautiful new introduction is an anemone-flowered dahlia featuring wonderfully rich pink and burgundy tones. It produces masses of flowers over a long season; from afar it appears to be a deep plum shade, but take a closer looks and you’ll see that each elongated petal curls inwards, showing the reddish underside of the petal at the front of the flower, contrasting with the magenta upper side of the petals. Dahlia 'Purple Haze' is a plant where the flowers and foliage work really well together, with the rich tones of the flowers offset beautifully by large dark leaves. This intensity of colour captures the essence of the summer and early autumn garden, glowing in the softer light of the late season and chiming beautifully with the autumn’s rich, mellow atmosphere.
Dahlia 'Purple Haze' is neat and compact, at a height of around 80cm, making a good option for both the border and for containers. Try combining this with other rich-toned dahlias like 'Totally Tangerine' and perennials like Verbena bonariensis or purple-flowered Salvia 'Caradonna' for a sumptuous display. 'Purple Haze' is also a great dahlia for cutting: those anemone flowers with their flattened outer petals and dense centres create lovely contrasts with other dahlia flower-shapes, such as the spiky cactus dahlias, orchid dahlias and of course the big dinnerplate dahlias.
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 'Purple Haze'
- Flower colour
- Magenta, red, purple
- Tuber size
- 1
- Established height
- 70cm-1m
- 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
- No
- 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%
Paeonia 'Lemon Chiffon'
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Sale price
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Sale price
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Allium 'Purple Sensation'
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£3.92
Sale price
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Fritillaria meleagris 'Mix'
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£5.52
Sale price
£6.90
-30%
Narcissus 'Double Mixed'
Regular price
£5.25
Sale price
£7.50
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