Oemleria cerasiformis is a BC native known as Indian plum or osoberry. It blooms early in the spring with fruit in early summer.

Olea europaea Black Pearl produces abundant crops of flavourful, early-ripening fruit that will turn jet black on the tree.

Olea europaea Bountiful has very good cold hardiness in zone 8 and produces abundant crops of flavourful, early-ripening fruit.

Olea europaea Harvest Joy produces abundant crops of large, flavourful fruit for table olives or olive oil.

Olea europaea 'Maurino' is an excellent Tuscan olive oil cultivar that produces a delicate and aromatic oil.

Olea europaea Midnight offers excellent cold hardiness likely to zone 7 with fruit that ages to jet black.

Olea europaea 'Mission' is a distinctive Californian cultivar developed in the 1780s by Franciscan monks .

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.