With toothed or pinnately lobed leaves and small salver-shaped flowers in spikes, panicles or corymbs in summer or autumn.
A tuberous perennial to 60cm, grown as an annual, with oblong leaves and clusters of fragrant, bright purple flowers on branched stems in late summer.
A clump-forming, evergreen perennial with broad, arching, strap-shaped, glossy, dark green leaves and sturdy, erect...
Long popular in Cottage gardens, this is a rugged and easy perennial for any sunny...
Tall, purple-flushed, leafy stems, which rarely need supporting, are topped with large dome-shaped clusters of...