Olea europaea Nikita Jubilee is hardy to zone 7 and produces abundant crops of very large, flavourful, early-ripening fruit.

Olea europaea 'Nocellara' hails from the Valle de Belice area of Sicily and is used to produce Castelvetrano olives.

Olea europaea Perpetua is hardy to zone 7 once mature and produces abundant crops of large, flavourful, early-ripening fruit.

Olea europaea Premier is from the Nikita Botanic Garden in the Ukraine. It produces very large, tasty olives.

Olea europaea Seascape has proven itself a reliable producer in the Pacific Northwest of large, flavourful olives.

Olea europaea Star of Crimea is valued for its flavourful early-ripening fruit.

Olea europaea Universal hails from the Ukraine where it is valued for its large fruit and high oil content.

Ophiopogon 'Black Beard' is taller growing than 'Nigrescens' to one foot high forming fuller, more vigorous clumps.

Opuntia aurea 'Coombes Winter Glow' is a hardy evergreen Prickly Pear with bright pink flowers and green pads that turn dark purple in winter.

Opuntia macrorhiza (Charles B.) has rich, tangerine orange flowers.

Opuntia polyacantha 'Crystal Tide' has beautiful oval to diamond shaped, olive green pads with golden and white spines and silver pink flowers.

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

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

Origanum 'Bellissimo' is an ornamental oregano with pendulous purple-pink and white hop-like flower heads and green hop-like foliage.

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

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.

Osmanthus fragrans f. aurantiacus has small, orange, extremely fragrant, edible flowers famous in China for use in teas and other foods.

Osmanthus fragrans f. thunbergii has small, pale yellow, extremely fragrant, edible flowers famous in China.

The green, shamrock-like leaves of Oxalis violacea give rise to lavender or rose-pink flowers in spring.

Pachyphytum oviferum is a gorgeous succulent with palest silver blue, rounded, balloon-like leaves that can flush pink.

Pachyphytum bracteosum is an Echeveria relative with thick, rounded, silver-blue leaves.

Pachyveria (Echeveria) 'Ice Cream' has creamy pastel green leaves with pinkish tips.

Paeonia 'Bowl of Cream' has fully double creamy white flowers that can be up to 12 inches across!

Paeonia lactiflora ‘Early Scout’ is one of the earliest blooming of all peonies flowering at the same time as the late tulips!