Perovskia 'Denim 'n' Lace' is a dwarf cultivar of Russian sage with silvery foliage and purple-blue flowers.

Perovskia 'Lacey Blue' is a dwarf cultivar of Russian sage with the classic silver-green foliage and purple-blue flowers.

Perovskia 'Silvery Blue' is a dwarf cultivar of Russian sage with extra silver foliage and purple-blue flowers.

Persicaria affinis 'Border Jewel' is an attractive ground cover with multicoloured flower spikes and leaves turning brick red in fall.

Persicaria 'Blackfield' has wands of deep red flowers that last for months above bold mounds of lance-shaped, mid green foliage.

Persicaria 'Golden Arrow' has wands of red flowers that last for months above bold mounds of lance-shaped, golden foliage.

Wands of red flowers last for months above bold mounds of lance-shaped foliage.

Persicaria amplexicaulis 'Pink Elephant' is a compact mountain fleece with long blooming wands of pink flowers.

Persicaria bistorta 'Hohe Tatra' forms slowly spreading, semi-evergreen mounds topped with wands of densely-packed, glowing pink flowers.

Persicaria bistorta 'Superba' is a common bistort with spikes of soft pink flowers and semi-evergreen foliage.

Phlomis cashmeriana is an stately, architectural perennial with felted grey-green leaves and tall spikes with whorls of lavender pink, snapdragon-like flowers.

Phlomis fruticosa is a bold, architectural perennial or subshrub with felted, grey-green, sage-like leaves and clusters of bright yellow flowers in summer.

Phlomis russeliana is a tall and stately Jerusalem sage with mounds of fuzzy foliage and stems with clusters of buttery yellow flowers.

Phlomis tuberosa 'Amazone' has whorls lavender-pink blooms arranged in dense clusters at intervals along burgundy stems .

Phlomis tuberosa 'Bronze Flamingo' is a dramatic Jerusalem Sage with whorled clusters of lavender-pink flowers on dark red stems.

Phlox 'Minnie Pearl' has sweetly fragrant, pure white flowers on stems 1-2 feet tall with shiny, mildew-free leaves.

Phlox divaricata 'Blue Ribbons' is a woodland ground cover with fragrant lavender-blue flowers and variegated foliage.

Phlox paniculata 'Aureole' has charming, bright fuchsia blooms edged in contrasting chartreuse on short stems with a gentle, old-fashioned fragrance.

Phlox paniculata 'Blue Ice' has warm light purple and icy lavender-blue buds opening to pure white, fragrant flowers with occasional flushes of lavender-blue.

Phlox paniculata 'Blue Paradise' is mildew-resistant with a spicy vanilla-clove fragrance and lavender-blue flowers.

Phlox paniculata 'Cleopatra’ has lush, glowing pink and cherry red, star-shaped blossoms with a sweet, old-fashioned fragrance.

Phlox paniculata Garden Girl 'Glamour Girl' is a tall garden phlox that has purple stems with coral-pink flowers.

Phlox paniculata Garden Girls 'Party Girl' is a tall garden phlox that has pretty white flowers with pink centres on tall green stems.