Campanula persicifolia Telham Beauty
Larger flowers set Campanula persicifolia 'Telham Beauty' apart from the ordinary peach-leaved bellflower. The china-blue bells are broad and shallow, spaced along tall upright stems that rise from a neat evergreen rosette, and they open from November through to January. This is an older garden selection, still grown because the flower size stands up against anything newer.
Telham Beauty carries a border on its own for a few weeks in early summer, and it earns a spot beside a path or a seat where that flower size registers at close range. It mixes into cottage planting, sits well behind lower cranesbills and dianthus, and cuts for the house. Growing it in a pot works where the pot is deep enough to hold moisture.
Full sun to part shade suits it, in free-draining soil with compost dug through. It performs across most New Zealand districts. Afternoon shade helps in hotter inland gardens where strong sun bleaches the flower colour. Allow 30 to 40 cm between plants. Feed new-build soils before planting and mulch each spring to keep the roots cool.
Stems reach 0.7 to 0.9 m above a rosette about 0.4 m across, dying back after flowering but leaving the evergreen base intact.
Trimming: Shear the finished flower stems off at the top of the rosette in late summer, taking care not to cut into the evergreen leaves below. A tidy plant often throws a light second flush before autumn. Split congested clumps in March or April, replanting the strongest outer pieces.
Deadheading: Remove each spike as its last bell drops rather than waiting for the whole plant to finish. Telham Beauty holds a longer season than most bellflowers when kept picked over, and the large flowers make the job quick.
Fertilising: Feed once in early spring with a balanced slow-release fertiliser, then mulch. The large flowers need reasonable soil fertility to size up properly, so do not skip the spring feed on light or sandy ground. Avoid high-nitrogen products, which soften the stems.
Watering: Consistent moisture from September through to flowering gives the best stem height and flower size. Water deeply once or twice a week during dry weather instead of a daily sprinkle. Once flowering finishes, the plant needs much less.
Pest Control: Young rosette growth is taken by snails and slugs through late winter, so it is worth controlling them before shoots appear. Aphids sometimes settle on the flower stems and can be washed off with water.
Disease Management: Rust shows as orange spots on older leaves in humid weather. Strip affected foliage, improve airflow between plants, and keep water off the leaves. Good drainage over winter is the main defence against crown and root rot.
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