Unpack bare roots or rhizomes on arrival and plant them within a week. Until then, keep them somewhere cool and ensure the roots remain slightly moist, never wet.
Out of season
Campanula
'Superba'
bellflower
Few colours suggest rich and luxurious more than purple, and if you grow Campanula 'Superba', your garden will be given the feel of real opulence and luxury. Dense flower heads of large, bell-shaped, rich purple-blue flowers appear from May to September on tall stems that rise above rosettes of fresh, green, heart-shaped leaves. This beautiful campanula—one of the stunning clustered bellflowers—is perfect for a border in full sun or partial shade. A cottage garden favourite, it looks just at home, however, in modern or contemporary planting schemes. For best results, plant your Campanula 'Superba' bare roots in moist but well-drained fertile soil.
With such a long flowering period, and the spreading habit and foliage enabling the plant to offer weed-suppressing ground cover throughout summer, Campanula glomerata 'Superba' is hard to beat. In fact, with its reliability, consistency of colour, and good resistance to pests and diseases, this campanula is considered such a good plant, the Royal Horticultural Society (RHS) have awarded it a coveted Award of Garden Merit.
Quantity
Plant profile
Plant calendar
Remove the packaging straight away, check the compost and water thoroughly if dry. Check the plant’s hardiness before placing it outdoors. Plant into a border or permanent container within a month, choosing the position recommended for the variety. Keep the top of the root ball level with the surrounding soil, firm gently and water well.
Soak the roots in water for three to six hours immediately before planting. Keep any crown, buds or emerging shoots above the water where possible.
Pot most bare roots into 15–20cm pots filled with peat-free multipurpose compost. Large or depth-sensitive roots, including peonies, are often best planted directly into borders.
Arrange the roots naturally without bending them. Cover the roots completely, positioning the crown and buds at the depth recommended for that particular perennial.
Keep pots in a sheltered outdoor position and water whenever the compost begins to dry. Grow on until roots hold the compost together when lifted from the pot.
Plant into a suitable border or permanent container once well rooted. Add a label and water regularly throughout the first growing season while the perennial establishes.
- Botanical name
- Campanula glomerata 'Superba'
- Flower colour
- Purple
- Established height
- 30-50cm
- Established spread
- 20-30cm
- Growing skill
- Easy to grow
- Habit
-
Upright
Clump-forming - Hardiness
- Fully hardy
- Leaf colour
- Green
- Mouse resistant
- Yes
- Plant size
- 1
- Plant spacing
- 9 plants per m2
- Pollinator friendly
- Yes
- Position
- Sheltered
- Rabbit resistant
- No
- RHS Award (AGM)
- Yes
- Scented
- No
- Soil acidity
- Any
- Soil moisture
- Free draining
- Soil type
-
Loam
Loam-based compost
Multipurpose compost - Suitable for
-
Large containers
Borders
Meadows
Wildlife gardens
Cottage gardens
Low maintenance gardens - Sunlight
-
Full sun
Partial shade - Toxicity
- No report
- Years to establish
- 1-2 years
Pollinator-friendly
RHS Recommended
Perennial
Fully hardy
Packed peat-free
Low maintenance
Attracts wildlife
-20%
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