List of perennial plants 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!
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Oenothera fruticosa 'Fireworks'
Item #: 8719
Zones: 3a to 9b
Dormancy: Winter
Height: 20" tall
Culture: Sun to Part Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $20.00Regular priceUnit price per -
Oenothera riparia 'Colleton'
Item #: 17620
Zones: 7a to 9a, at least
Dormancy: Winter
Height: 36" tall
Culture: Sun to Part Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $21.00Regular priceUnit price per -
Onoclea sensibilis 'Supersize'
Item #: 9212
Zones: 3a to 9b
Dormancy: Winter
Height: 36" tall
Culture: Part Sun to Light Shade
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $23.00Regular priceUnit price per
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Onoclea sensibilis 'Texas Too Tall'
Item #: 8279
Zones: 3a to 9b
Dormancy: Winter
Height: 42" tall
Culture: Part Sun to Light Shade
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $23.00Regular priceUnit price per -
Sold outOnychium japonicum 'Sichuan Lace'
Item #: 5958
Zones: 7a to 9b, possibly colder
Dormancy: Winter
Height: 24" tall
Culture: Sun to Light Shade
Origin: China
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $23.00Regular priceUnit price per
Next crop available: 03/06/2026Sold out -
Ophiopogon japonicus 'Gyoku Ryu'
Item #: 551
Zones: 5a to 10b
Dormancy: Evergreen
Height: 3" tall
Culture: Part Sun to Shade
Origin: Japan
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $23.00Regular priceUnit price per -
Ophiopogon japonicus 'Snow Globe'
Item #: 12977
Zones: 6a to 10b
Dormancy: Evergreen
Height: 2" tall
Culture: Part Sun to Shade
Origin: Japan
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $23.00Regular priceUnit price per -
Ophiopogon planiscapus 'Kokuryu'
Item #: 721
Zones: 7a to 10b
Dormancy: Evergreen
Height: 6" tall
Culture: Part Sun to Shade
Origin: Japan
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $23.00Regular priceUnit price per -
Sold outOpuntia cacanapa 'Ellisiana'
Item #: 5564
Zones: 7a to 10b, possibly colder
Dormancy: Evergreen
Height: 36" tall
Culture: Sun
Origin: United States Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $25.00Regular priceUnit price per -
Opuntia fragilis 'Potato'
Item #: 14256
Zones: 4a to 8b, at least
Dormancy: Evergreen
Height: 3" tall
Culture: Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $25.00Regular priceUnit price per -
Origanum calcaratum
Item #: 10263
Zones: 7a to 8b, at least
Dormancy: Winter
Height: 15" tall
Culture: Sun
Origin: Crete, Greece
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $20.00Regular priceUnit price per -
Sold outOrixa japonica 'Pearl Frost'
Item #: 15656
Zones: 5b to 8a, at least
Dormancy: Winter
Height: 96" tall
Culture: Part Sun to Light Shade
Origin: Japan, Korea
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $35.00Regular priceUnit price per -
Orontium aquaticum 'Tidewater'
Item #: 13045
Zones: 5a to 8b
Dormancy: Winter
Height: 12" tall
Culture: Part Sun to Light Shade
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $24.00Regular priceUnit price per -
Sold outOrostachys malacophylla
Item #: 4954
Zones: 5a to 8b
Dormancy: Evergreen
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)
Regular price $22.00Regular priceUnit price per -
Osmunda cinnamomea
Item #: 1366
Zones: 3a to 9b
Dormancy: Winter
Height: 36" tall
Culture: Part Sun to Light Shade
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $22.00Regular priceUnit price per -
Sold outOxalis crassipes 'Cherry Spritzer'
Item #: 12350
Zones: 6a to 9b, at least
Dormancy: Winter
Height: 10" tall
Culture: Part Sun to Light Shade
Origin: Argentina, Brazil
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $22.00Regular priceUnit price per -
Sold outOxalis melanosticta 'Ken Aslet'
Item #: 17444
Zones: 7b to 10b
Dormancy: Winter
Height: 3" tall
Culture: Sun to Part Sun
Origin: South Africa, Southern Africa
Pot Size: 2.5" pot (7.9 fl. oz/233 ml)
Regular price $23.00Regular priceUnit price per -
Sold outOxalis triangularis 'Atropurpurea'
Item #: 589
Zones: 7a to 10b, possibly colder
Dormancy: Winter
Height: 8" tall
Culture: Part Sun to Light Shade
Origin: South America
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $21.00Regular priceUnit price per
