Paeonia 'Watermelon Wine' has semi-double red flowers with yellow centres. Itohs are exciting crosses between tree and garden peonies.

Paeonia 'Yellow Crown' has yellow flowers with a blush of red at the centre. Itohs are exciting crosses between tree and garden peonies.

Paeonia 'Yellow Dream' offers cheerful lemon yellow semi double flowers with red markings at the centre.

Pandanus amaryllifolus, known as pandan or screw pine, is an evergreen tropical with fragrant leaves used in culinary dishes.

Panicum virgatum 'Totem Pole' forms a strongly upright column of steel blue leaves and powder blue stems to 6 feet.

Papaver orientale 'Burning Heart' has ruffly, glowing, rich pink flowers that become darker, almost red, towards the black centres.

Papaver orientale 'Carnival' emeres red with a ruffled, white picotee edge developing white petal bases as they age.

Papaver orientale 'Central Park' has frilly raspberry-purple flowers with interior black blotches.

Papaver orientale 'Curlilocks' has large, fringed, fiery red petals with bold black spots and bold black spots around black stamens.

Papaver orientale 'Eye Catcher' has large, ruffled fiery red petals with bold black spots and bold black spots around black stamens.

Papaver orientale 'Garden Glory' has frilly double flowers in shades of salmon pink with black central blotches.

Papaver orientale 'Perry's White' has frilly pure white flowers with maroon-purple splotches around the black centres.

Papaver orientale 'Pink Pearl' is an Oriental poppy with double-ruffled, lavender-pink petals and longer lived foliage.

Papaver ‘White Ruffles' is a compact Oriental poppy with large, ruffled white flowers and black centers.

The hardiest of all passionflowers, Passiflora incarnata 'Alba' has ornate white flowers and tasty fruit.

The hardiest of all passionflowers, Passiflora incarnata 'Pink Pop' has ornate lavender-pink flowers and tasty fruit.

Pelargonium crispum 'Lemona' is a tender, lemon-scented geranium with pink and magenta flowers that are both ornamental and edible.

Pelargonium 'Captain Starlight' is a delightful geranium with magenta, pink and white flowers.

Pelargonium 'Orange Fizz' is a tender,citrus-scented geranium with single flowers that are pink and purple and scented with evergreen foliage.

Pelargonium 'Sweet Mimosa' is a tender, spicy-scented geranium with single flowers that are pink and red with scented evergreen foliage.

Penstemon caespitosus 'Wagon Wheel' is a ground hugging perennial with stems that grow into circular mats of small blue flowers.

Penstemon 'Midnight Masquerade' is a tall beardtongue with very dark foliage and lavender flowers with white interiors.

Penstemon digitalis 'Onyx and Pearls' is a beard tongue with lavender-white flowers and contrasting dark foliage and stems.

Penstemon grandiflorus 'Prairie Jewel' is a beardtongue with tall stems of lavender-pink to deep purple flowers and green-blue foliage.

Penstemon 'Cha Cha Purple' offers tubular wine-purple flowers all summer long.