1 Salvia nemorosa 'Caradonna’ from the mildly aromatic silvery green leaves to the violet flower spikes with purple stems. Bees love the flowers that stay looking sharp long after the petals fall, thanks to papery bracts that hold their colour. Dead-heading – either little and often or in one go – encourages new flowering side-shoots till October. 'Caradonna’ loves sun; use it as a purple ribbon through late season grasses or, at 18in (45cm), it is the perfect centrepiece for a pot.
Sedum "Red Cauli" A fleshy-leaved perennial with plum-purple foliage and tightly-packed cauliflower-like heads. The pink flowers appear in late summer and turn to red as the season moves into autumn. The blooms are followed by eye-catching deep maroon seedheads extending its season of interest into late autumn and beyond. Hardy Purple fleshy leaves Pink to dark red flowers HxS 30x30cm Full sun Loved by butterflies Flowers - September-October RHS Award of Garden Merit
Salvia nemorosa ''Sensation Rose' (Sensation Series)' - Throughout summer, spikes carry masses of rose pink flowers, each sitting within a deeper purplish-pink calyx. Their compact, tidy habit makes them ideal for containers and window boxes, as well as creating colourful drifts towards the front of a sunny border.