Opuntia 'Peach Chiffon' produces marvelous peachy pink flowers with slightly darker centres.

Opuntia 'Red Gem' has small, round, 2-3 inch wide pads with short spines and deep pink to magenta flowers.

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.

Origanum 'Drops of Jupiter' is an ornamental oregano with pink flowers and aromatic, chartreuse-yellow foliage.

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

Ornithogalum nutans has spikes of fragrant, outward-facing to slightly nodding, star-shaped flowers coloured white and grey-green.

Ornithogalum pyramidale forms pyramidal spikes of fragrant, outward-facing, pure white, star-shaped flowers with green-striped reverses in early summer.

Ornithogalum reverchonii is a rare star-of-Bethlehem with spikes of fragrant, outward-facing, pure white, bell-shaped flowers on stems 24-36 inches tall.

Osmanthus fragrans has fragant white flowers aging to yellow. Used in China in teas and desserts.

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.

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

A great alternative to the standard Pachysandra terminalis , P. procumbens also has fragrant flowers and more attractive foliage.

Pachysandra terminalis 'Green Sheen' forms whorls of glossy, leathery foliage topped with white flowers in spring.

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

Paeonia lactiflora 'Big Ben' produces huge, double, bomb-type heads of beautifully fragrant, cherry red flowers.

Paeonia lactiflora 'Bouquet Perfect' is a gorgeous mid season anemone type peony with glowing bright pink to magenta flowers.

Paeonia lactiflora 'Bowl of Love' is a more compact 'Bowl of Beauty' with a bowl of delicious carmine pink cupping a ruffled pale yellow centre.

Paeonia lactiflora 'Celebrity' has bright magenta guard petals displaying a rambunctious mass of magenta and white inner petalodes.

Paeonia lactiflora 'Charlie's White' is a beautiful double peony with white outer petal and creamy white to palest yellow inner petals.

Paeonia lactiflora 'Coral Charm' is a striking, early season, semi-double peony with large coral, peach and pink flowers.

Paeonia lactiflora 'Coral Sunset' is a striking, early season, semi-double peony with large coral, peach and rose flowers.

Paeonia lactiflora 'Do Tell' is an anemone type peony with delicate pale pink cups forming a ruffled bowl around a frilly dark pink centre.

Paeonia 'Duchesse de Nemours' is an heirloom peony more than 150 years old with stunning ivory white double flowers.