|Papaver orientale "'Medallion'"|
Long-blooming variety. Plum-red flowers fading to dusky pink.
|Penstemon "Pensham Plum Jerkum"|
Plum-purple flowers with white mottled throats.
Also known as White Bedder. Clusters of large white, tubular flowers over a long season.
|Persicaria amplexicaulis "Pink Lady"|
Pink flower spikes. Large pointed leaves.
|Persicaria bistorta "Superba"|
Large, fat pink spikes in early to mid summer. To 30in (75cm). Sun or part shade. Needs moist soil. Good in borders or along edge of pond. Insect friendly.
|Persicaria campanulata "Alba"|
Slender, branched spikes of small, pale pink flowers on tall stems over deeply-veined leaves.
Attractive chevron-marked leaves. Spikes of small red flowers.
|Persicaria virginiana var filiformis "Painter's Palette"|
Green and cream marbled leaves with red chevron in centre.
Whorls of tubular, pale yellow flowers. Rough-textured, sage-like leaves.
|Phlox carolina "Miss Lingard"|
Upright perennial with clusters of large, pure white flowers.
|Phlox maculata "Omega"|
Fragrant white flowers with lilac eye.
|Phlox paniculata "Norah Leigh"|
Creamy variegated leaves. Many pale mauve flowers with pink eyes.
|Phlox paniculata "Tiara"|
Dense heads of creamy-white, scented flowers with green tinge.
|Phlox paniculata "Eden's Flash"|
Bright pink flowers with darker eye.
|Phlox paniculata "David"|
Bright green leaves and fragrant, clear white flowers.
|Phlox paniculata "Starfire"|
Upright form Large panicles of crimson flowers over red-tinged leaves.
|Phlox paniculata "Uspekh"|
Fragrant lilac flowers with large, white star centres.
|Phlox paniculata "Othello"|
Claret red, lightly scented flowers over purple-flushed, dark green leaves.
|Phlox paniculata "Prince of Orange"|
Scented, orange-red flowers in large panicles.
|Phlox paniculata "Tenor"|
Deep red-pink, scented flowers over dark foliage.
|Physostegia virginiana "Miss Manners"|
Spikes of white, tubular flowers.
|Physostegia virginiana "Vivid"|
Dense spikes of dark rose flowers.
Dramatic, fast-growing, herbaceous perennial. White or pink flower spikes develop into dark maroon berries.
|Plectranthus argentatus "Hill House"|
Silver-green leaves edged with cream. Spikes of lilac flowers.
|Plectranthus argentatus "Silver Shield"|
Foliage plant. Bold silver grey, furry leaves. Pale blue-white flowers.
|Polemonium "Lambrook Mauve"|
Compact hybrid, more delicate than other polemoniums. Soft pink-mauve flowers over ferny foliage.
|Polemonium "Northern Lights"|
Soft blue flowers, slightly scented, over ferny foliage.
|Polemonium "Sonia's Bluebell"|
Pale blue, bell-shaped flowers with ferny foliage over a long period.
|Polemonium "Pink Beauty"|
Divided green leaves with mauve-pink, bell-shaped flowers.
|Polygala x dalmaisiana|
Bushy evergreen shrub with pea-like, reddish-purple flowers.
|Polypodium "Whitley Giant"|
Fern with very attractive, broad, evergreen fronds.
|Polystichum setiferum "Pucherrimum Bevis"|
Elegant fern with divided, deep green, lace-like fronds.
|Potentilla "Monsieur Rouillard"|
Clusters of double or semi-double, rich red flowers.
|Primula "Dark Rosaleen"|
Deep red flowers with yellow eye over glossy, bronze leaves.
|Primula "Don Keefe"|
Large, deep red flowers on tall stems. Reliable.
|Primula "Elizabeth Killelay"|
Double lace-cap primula. Maroon with gold edge.
Unusual green-yellow flowers with yellow eye.
|Primula "Kusham Krishna"|
Grey-green crinkled foliage. Large, deep violet flowers with white eye.
|Primula "Tie Dye"|
Scented, long-lasting blue flowers with white markings and yellow eyes.
Flat rosette of crinkly leaves. Whorls of reddish-pink flowers.
Red buds open into whorls of orange-yellow flowers around upright stems.
Upright, mealy-white stems bearing large reddish-purple flowers.
|Primula sieboldii "Snowdrop"|
Pure white flowers from rosette of leaves.
|Primula veris "Katy McSparron"|
Scented, deep yellow flowers like cowslips but fully double.
|Prunella vulgaris "Rosenkugel"|
Also known as Prunella 'Rose Pearl'. Purple-pink two-lipped flowers. Compact habit.
|Pulmonaria "Blue Ensign"|
Large, bright blue flowers over dark green leaves.
|Pulmonaria "Diana Clare"|
Attractive silver-marked leaves for several months Purple-blue flowers. 12in (30cm) Prefers some shade.
Semi-evergreen perennial with silver-speckled leaves. Clear, pale blue flowers opening from pale pink buds.
|Pulmonaria "Stillingfleet Meg"|
Clusters of flowers open pink and change to blue with age. White-spotted foliage.
|Pulsatilla vulgaris "Heiler hybrids"|
Hairy buds open into flowers of red, pink, violet, cream or white. Attractive fluffy seedheads useful in flower arranging.
|Pulsatilla vulgaris "Papageno"|
Large, semi-double with fringed petals, in purple, pink, red or white.
Attractive silky seed heads.
|Pulsatilla vulgaris "Alba"|
Pure white, bell-shaped flowers followed by attractive seed heads.
|Puschkinia scilloides var libanotica|
Small, star-shaped, near white flowers with pale blue stripe.