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
Dahlia
'Penhill Autumn Shade'
Hold onto the sunshine in your garden all the way through summer and into the golden days of autumn with Dahlia 'Penhill Autumn Shade'. This eye-catching dahlia will illuminate borders and containers with its fabulous star-like blooms in a warm salmon-pink shade, glowing with a golden-yellow centre. A unique semi-cactus variety, Dahlia 'Penhill Autumn Shade' has fully double, very large flowers and petals that point outwards with exuberance, giving it great impact and personality. Be assured that this one is going to get noticed!
Dahlias are superb plants for keeping things interesting and fresh in the garden all the way though the season. In the garden or on the patio, Dahlia 'Penhill Autumn Shade' blends excellently with pinks, yellows and purples, allowing you to create some lovely combinations and keep the show going for many weeks. This unusual variety also makes a gorgeous cut-flower, with its long-lasting blooms on strong stems. At around 20cm in diameter, the blooms of Dahlia 'Penhill Autumn Shade' make a bold statement in a vase, and if picked just as - or just after - they have fully opened, will last for many days.
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 'Penhill Autumn Shade'
- Flower colour
- Salmon, pink, peach, yellow
- Tuber size
- 1
- Established height
- 1.2-1.5m
- Established spread
- 50-70cm
- 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 - 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
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