About Campanula poscharskyana Degen
This plant, scientifically named Campanula poscharskyana Degen, has leaves that measure 2.5–4.0 cm (1–1+1⁄2 inches) long. Its trailing shoots grow along the ground to a length of around 20–25 cm (7+3⁄4–9+3⁄4 inches), before growing upward to hold flowers roughly 10 cm (3.9 inches) above ground. The lavender-blue flowers bloom from mid-spring to early autumn. Campanula poscharskyana Degen is a tough rockery plant that produces sprays of violet star-shaped flowers in spring and summer. It is vigorous and fast-growing, and can tolerate drying out once it is established growing on a wall. It will self-seed into cracks in walls and paving. While it survives best at winter temperatures between 5–10 °C (41–50 °F), it can tolerate both colder and warmer conditions. Though it is considered winter hardy, many growers bring it indoors over winter, growing it in slightly moist soil on a windowsill or in a basement under a lamp. It is common practice to cut the plant back in fall to help it conserve energy through winter, then replant it in spring. No fertilizer is required during winter. This species can be propagated from stem cuttings or by dividing the roots. Numerous varieties and cultivars have been developed for garden use, including 'Blue Gown', 'Blue Waterfall', 'Freya', 'E.H. Frost', 'Glandore', 'Lisduggan Variety', 'Senior', and 'Silberregen'. The cultivar 'Stella' has received the Royal Horticultural Society's Award of Garden Merit. Its leaves are edible year-round, and may be added to salads.
