Monarda Upscale 'Red Velvet' is a tall and large, mildew-resistant beebalm with fragrant red flowers and aromatic foliage.

Monardella macrantha 'Marian Sampson' is a unique ground cover with clusters of long, tubular, flaming red flowers popular with hummingbirds.

Muhlenbergia 'Undaunted' or ruby muhly grass offers clouds of ruby red flowers in late summer and fall.

Mukgenia 'Nova Flame' is an unusual intergeneric hybrid breakthrough between useful Bergenia and the lesser known Mukdenia.

Myosotidium hortensia is an exceedingly rare species in horticulture and in the wild. Known as the Chatham Islands forget-me-not.

Nepeta 'Cat's Pajamas' is a compact catmint forming low mounds of blue flowers with rosy purple sepals right down to the ground.

Nepeta 'Chartreuse on the Loose' is a compact catmint with lavender-blue flowers and contrasting yellow-green foliage.

Nepeta 'Neptune' is a compact catmint forming a low mound of intense blue to almost purple full sized flowers.

Nepeta 'Picture Purrfect' is a compact catmint forming a low mound of large, purple-blue flowers from early summer to early fall.

Nepeta grandiflora 'Summer Magic' is a compact and sturdy catmint with fragrant, violet flowers from summer to early fall.

Nipponanthemum nipponicum or Nippon daisy is a little-known yet easy-to-grow, fall-flowering daisy.

xOredenia 'Fusion of Fire' is an intergeneric hybrid with huge notched leaves, pink flowers, and red fall colour.

Origanum 'Kent Beauty' has cute shrimp-like, pink flowers held in pendulous clusters from blue-green foliage.

Origanum 'Gilt Trip' is an ornamental oregano with lilac flowers, mauve calyxes and aromatic, chartreuse-yellow foliage.

Origanum 'Kirigami' forms mounds of aromatic, light green foliage and purple, pink, and green, hops-like inflorescences.

Osmunda cinnamomea, the cinnamon fern, has lush green vegetative fronds and cool rusty orange sporophytic fronds.

Osteospermum 'Avalanche' is a super hardy African daisy that blooms from spring until fall with masses of large, dazzling white daisies.

Osteospermum 'Purple Mountain' is a super hardy African Daisy with warm lavender purple daisies with yellow centres for months on end.

Oxalis griffithii 'Pink Double Flower' is a rare form with shamrock-like leaves and pink double flowers.

Oxalis oregana 'Klamath Ruby' is a special redwood sorrel with darker green leaves with wine red undersides.

The redwood sorrel, Oxalis oregana, is a lovely native shade ground cover with beautiful shamrock foliage.

Packera obovata is a daisy relative that forms a great ground cover for sun or shade with cheerful yellow flowers.

Paeonia 'Canary Brilliants' are creamy yellow with highlights of apricot and pink.

The blooms of Paeonia 'Caroline Constabel' are pink to salmon pink with dark centres. Itohs are exciting crosses between tree and garden peonies.

Paeonia 'Cora Louise' has pure white flowers with a rich magenta purple centre.

The double blooms of Paeonia 'Danse du Feu' are a mix of light yellow, pink, and apricot. Itoh peonies are exciting crosses between tree and garden peonies.

Paeonia 'Duchesse de Lorraine' has fully double flowers in shades of lemon yellow.

Paeonia 'Kopper Kettle' has semi-double to double coppery reddish pink flowers.

Paeonia 'Magical Mystery Tour' opens creamy yellow with a flush of lilac pink, aging to ivory with a pink picotee and red centres.

Paeonia 'Scrumdidleumptious' Salmon pink flowers with yellow and pink highlights.

Paeonia 'Singing in the Rain' offers tones of pink, apricot, and creamy yellow. Itohs are exciting crosses between tree and garden peonies.

Panicum virgatum 'Blood Brothers' is a sport of 'Heavy Metal' with red tipped, blue-green foliage and red to tan seed heads.

Panicum virgatum 'Niagara Falls' is a dramatic switch grass with arching powder blue foliage and creamy seedheads.

Panicum 'Northwind' is a Perennial Plant of the Year forming stately bluish green exclamation points for the garden.

Papaver orientale 'Beauty of Livermere' has very frilly scarlet-red flowers with a dark centres and splotches.

Papaver orientale 'Fruit Punch' is an Oriental poppy seed strain with large ruffled petals in hot pink, orange, plum, and red.

Papaver orientale 'Harlem' is an Oriental poppy with double-ruffled red petals, dark purple eyes and interior black blotches.

Papaver 'Harvest Moon' produces large, tangerine orange, single to double flowers on tall stems.

Papaver 'Heartbeat' produces large, deep red flowers with black centres.

Papaver 'Patty's Plum' has large, dusky purple flowers with deep, dark central stamens surrounded by near-black spots.

Papaver 'Picotee' has large, white petals with a distinctive orange frilled edge.

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

Papaver 'Princess Victoria Louise' is a gorgeous oriental poppy with peachy pink flowers and bold black centre.

Papaver orientale 'Raspberry Queen' has ruffly, glowing raspberry pink flowers with interior black blotches.

Papaver orientale 'Royal Wedding' has ruffly, pure white flowers with interior purple-black blotches.

Papaver orientale 'Turkenlouis' has fringed, vermillion-orange, crepe-papery flowers.

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

Paris polyphylla is an exquisite Asian trillium relative. A choice specimen for the shade garden.

Paris thibethica is a rare trillium relative from Asia with narrow, hair-like petals and lovely flower structure.

Pennisetum alopecuroides 'Lemon Squeeze' is a fountain grass with chartreuse-golden foliage and copper seedheads.

Pennisetum orientale 'Karley Rose' has great dusty rose flowers that lighten to silver through the summer.

Penstemon 'Cha Cha Cherry' offers tubular bright bright red flowers all summer long.

Penstemon 'Cha Cha Lavender' offers tubular lavender purple and white flowers all summer long.

Penstemon 'Flock of Flamingos' offers tubular, two-tone pink flowers all summer long.

Penstemon barbatus 'Coral Baby' has glowing, intense, coral-pink, tubular flowers continuously from mid spring until frost on long-lived plants!

Penstemon davidsonii is a lovely little native beard tongue with lavender pink flowers overlain with an iridescent blue.

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 digitalis Dakota 'Burgundy' is a beard tongue with lavender-pink tubular flowers and burgundy foliage.

Penstemon fruticosus is a native beard tongue with large lavender purple flowers on short, spreading mats.

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

Penstemon Nova 'Pearl' offers tubular white flowers on upright stems all summer long.

Penstemon pinifolius 'Compactum' Half Pint has bright scarlet red, tubular flowers that will draw hummingbirds from miles around.

Penstemon pinifolius 'Mersea Yellow' has lemon yellow flowers that will draw every hummingbird from miles around.

Penstemon pinifolius SteppeSuns 'Sunset Glow' has warm orange flowers that will draw every hummer from miles around.

Penstemon rostriflorus is a large, long-lived beard tongue 2-3 feet tall producing tons of scarlet red tubular flowers from late July until frost.

Penstemon strictus is a tall, dramatic species to about 30 inches with bold blue and purple tubular flowers.

Penstemon xylus 'Tushar Blue' is an evergreen ground hugging perennial with lavender-blue tubular flowers.

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

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

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

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

Persicaria 'Red Dragon' has dramatic purple and silver lance-shaped leaves marked with a mint chevron.

Persicaria polymorpha or giant fleece flower is a HUGE perennial for the back of the border with months of white flowers.

Virginia blue fern (Phlebodium aureum) offers amazing silver blue foliage for mild climates or as a striking houseplant.

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

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

Phlox paniculata 'Jeana' is a standout pollinator magnet with excellent powdery mildew resistance.

Phlox paniculata 'Olympus' is a tall garden phlox with striking variegated foliage and fragrant magenta-pink flowers.

Phlox paniculata 'Orchid Green' is a tall garden phlox with large, fragrant white flowers and lime-green picotee edging.

Phlox paniculata 'Orchid Yellow is a tall garden phlox with large, fragrant pink flowers and lime-green to yellow edging.

Phlox paniculata Luminary 'Opalescence' is a tall garden phlox that has light pink flowers with dark pink eyes and great fragrance.

Phormium 'Yellow Wave' is a bright and beautiful New Zealand flax with arching, green and gold striped leaves.

Phygelius 'Moonraker' is a South African fuchsia-like sub-shrub with soft creamy yellow, tubular flowers all summer long.

Pleione limprichtii produces beautiful fuchsia-pink flowers with red spotted, tubular lips.

Pleione speciosa is one of the easiest and hardiest species to grow with exquisite magenta-pink flowers in spring.

Podophyllum 'Spotty Dotty' is a hybrid mayapple with lobed umbrella-shaped leaves with dramatic chocolate-brown spotting.

Polemonium pulcherrimum 'Golden Feathers' is a Jacob's ladder with variegated green and yellow foliage and mauve flowers.

Polemonium reptans 'Touch of Class' has green and white variegated foliage with pink flower buds that open to light blue, fragrant flowers.

Polemonium 'Bressingham Purple' is a Jacob's ladder with purple foliage and purple flowers that smell like grape Hubba Bubba!

Polygonatum odoratum 'Ruby Slippers' has bright red stems, green foliage with silver undersides, and white, pendulous flowers.

Polystichum munitum, the western sword fern, is a classic West Coast species found commonly in our forests.

Primula 'Elizabeth Killelay' is a unique and vigorous primrose with double burgundy flowers with golden edges.

Primula auricula Bavarian Gaudi 'Alois' is an auricula primrose with single flowers displaying rings of black, white and yellow.

Primula auricula Bavarian Gaudi 'Fanny' is an auricula primrose with single flowers of light blue and violet-blue with yellow centres.

Primula auricula Bavarian Gaudi 'Gretel' is an auricula primrose displaying rings of red, white and yellow.

Primula auricula Bavarian Gaudi 'Gustl' is an auricula primrose with single flowers displaying rings of green, yellow and white.

Primula auricula Bavarian Gaudi 'Liesl' is an auricula primrose with single flowers of yellow and reds.

Primula auricula Bavarian Gaudi 'Louis' is an auricula primrose with single flowers in rings of yellows and reds.

Primula auricula Bavarian Gaudi 'Ludwig' is an auricula primrose offering shades of rich, velvety purple and yellow.

Primula auricula Bavarian Gaudi 'Mare' is an auricula primrose offering clusters of fragrant, creamy white, double flowers.

Primula auricula Bavarian Gaudi 'Mariandl' is an auricula primrose with single flowers of purple-black, violet-blue and white.

Primula auricula Bavarian Gaudi 'Mare' is an auricula primrose offering clusters of fragrant double flowers in purple shades.

Primula auricula Bavarian Gaudi 'Servaz' is an auricula primrose offering clusters of fragrant double burgundy red flowers.

Primula auricula Bavarian Gaudi 'Stanzerl' is an auricula primrose in shades of cream, lemon yellow, and burgundy.

Primula auricula Bavarian Gaudi 'Traudl' is an auricula primrose with single flowers of orange-red and yellow.

Primula auricula Bavarian Gaudi 'Servaz' is an auricula primrose offering clusters of single velvety royal purple and yellow flowers.

Primula beesiana is a candelabra primrose with beautiful mid to deep pink flowers with deep yellow eyes.

Primula denticulata is a unique primrose with perfect spheres of flowers. Colours can be white, pink, lavender or magenta.

Primula japonica 'Apple Blossom' has pale pink flowers produced in tall multi-tiered inflorescences.

Primula japonica 'Miller's Crimson' has deep almost true red flowers produced in tall multi-tiered inflorescences.

Primula vialii has amazing pagodas of lavender pink flowers emerging from bright red buds. A marvel of the genus!

Primula vulgaris 'Oakleaf Blue' is an unusual primrose with lobed leaves and purple-blue flowers with yellow centres.

Primula vulgaris 'Oakleaf Magenta' is an unusual primrose with lobed leaves and umbels of magenta-red flowers.

Primula vulgaris 'Oakleaf Yellow Picotee' is a primrose that has unusually lobed leaves and umbels of bright yellow, orange, and red flowers.

Primula Belarina 'Baltic Blue' offers fully double, ruffled, soft to mid blue flowers with darker striping.

Primula Belarina 'Beaujolais' offers fully double, ruffled, warm grape purple flowers.

Primula Belarina 'Candy Frost' offers fully double, ruffled, deep lavender pink and white flowers.

Primula Belarina 'Cream' has enormous heads of fragrant spring double flowers in creamy white.

Primula Belarina 'Pink Ice' has enormous heads of fragrant spring double flowers that open white and then develop icy pink tones.