List of Garden Perennials that start with the letter 'O', such as Oenothera, Onoclea and Oxalis. You'll love these perennial plants so much you'll make an 'O'-face! Enjoy!
Oenothera fruticosa 'Fireworks'
Item #: 8719
Zones: 3a to 9b
Height: 20" tall
Culture: Sun to Part Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Olea europaea 'Arbequina'
Item #: 2770
Zones: 7b to 10b
Height: 120" tall
Culture: Sun
Origin: Mediterranean Europe
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Onoclea sensibilis 'Texas Too Tall'
Item #: 8279
Zones: 3a to 9b
Height: 42" tall
Culture: Part Sun to Light Shade
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Ophiopogon japonicus 'Bluebird'
Item #: 3406
Zones: 6a to 10b
Height: 2" tall
Culture: Part Sun to Shade
Origin: Japan
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Ophiopogon japonicus 'Gyoku Ryu'
Item #: 551
Zones: 5a to 10b
Height: 3" tall
Culture: Part Sun to Shade
Origin: Japan
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Ophiopogon japonicus 'Snow Globe'
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Item #: 12977
Zones: 6a to 10b
Height: 2" tall
Culture: Part Sun to Shade
Origin: Japan
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Ophiopogon planiscapus 'Kokuryu'
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Next crop available: 03/15/2017
Item #: 721
Zones: 7a to 10b
Height: 6" tall
Culture: Part Sun to Shade
Origin: Japan
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Opuntia cacanapa 'Ellisiana'
Item #: 5564
Zones: 7a to 10b, possibly colder
Height: 36" tall
Culture: Sun
Origin: United States Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Origanum laevigatum 'Lizzie'
Item #: 9824
Zones: 6a to 8b
Height: 15" tall
Culture: Sun
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Orostachys iwarenge
Item #: 10243
Zones: 6a to 8b, at least
Height: 1" tall
Culture: Sun to Part Sun
Origin: China, Japan
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Orostachys malacophylla
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Item #: 4954
Zones: 5a to 8b
Height: 2" tall
Culture: Sun to Part Sun
Origin: China, Japan, Korea, Mongolia, Russia
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Osmunda cinnamomea
Item #: 1366
Zones: 3a to 9b
Height: 36" tall
Culture: Part Sun to Light Shade
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Oxalis regnellii 'Francis'
Item #: 8557
Zones: 7b to 10b
Height: 8" tall
Culture: Part Sun
Origin: South America
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Oxalis regnellii 'Triangularis'
Item #: 589
Zones: 7a to 10b, possibly colder
Height: 8" tall
Culture: Part Sun to Light Shade
Origin: South America
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
