 | Oak Hill Gardens ENGLISH
Diverse selection of orchid species and hybrids offered. Established in 1973. Liese Pigors-Butler, Greg Butler, Hermann Pigors. Dundee, Illinois, USA.  |
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| Oak Knob Orchids ENGLISH
Specializing in Cattleya and Vanda allied plants. Hybrids and species. Bardstown, Kentucky, USA. |
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| Oasis the Journal ENGLISH
Quarterly publication covering aspects of many species and genera, from a wide range of geographical areas. Eco tours and online book store. Rod Rice. Long Jetty, New South Wales, Australia. |
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| Ocean Orchids SLOVENIAN / ENGLISH
Wholesale potted orchid grower concentrating on markets in Slovenia, Hungary, Italy, and Croatia. Established in 2003. Dobrovnik, Slovenia. |
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| Odom's Orchids ENGLISH
Specializing in Cattleya and Phalaenopsis mericlones and seedlings. John and Louise Odom. Fort Pierce, Florida, USA. |
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| OFE International ENGLISH
Large selection of supplies for growing orchids. Carlos A. Cahiz. Miami, Florida, USA. |
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 | Okanagan Orchid Society ENGLISH
Meetings and activities information. Established in 1994. Kelowna, British Columbia, Canada. |
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 | Okinawan Orchis JAPANESE / ENGLISH
Information (including photos) about Amitostigma lepidum (Okinawan orchis). Okinawa, Japan. |
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| OKIS - Tai-Lin Biotech CHINESE / ENGLISH
Major Phalaenopis producer, established in 1997, located in Tainan, Taiwan. |
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| Olomana Orchids ENGLISH
Selection of orchid genera offered including Dendrobium, Oncidium, and Cattleya. Peter Neifert. Kaneohe, Hawaii, USA. |
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| Ooi Leng Sun Orchids ENGLISH
Diverse selection of orchid genera offered for sale. Culture and distribution notes. Penang, Malaysia. |
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| Orange County CA Branch - CSA ENGLISH
Branch of the Cymbidium Society of America. Contact, meeting and awards information. Anaheim, California, USA. |
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| OrchClub UKRAINIAN
Forum for discussing orchid topics including sections for buying, selling, and exchanging. Kiev, Ukraine. |
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| Orchid ENGLISH
Blog covering a variety of orchid topics including growing in the tropics, photos, culture, nursery, and Internet resources. Soerjo Winarto. Cileungsi, West Java, Indonesia. |
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| Orchid RUSSIAN
Digital periodical covering a diverse range of orchid topics. Photo gallery and discussion forum. Russia. |
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| Orchid Academy ENGLISH
Providing illustrated correspondence courses about orchid growing for newcomers to the world of orchids and for more advanced growers and those seeking employment in the orchid industry. Author of 'Growing Orchids in Your Garden' (Timber Press, 2004). Lili and Robert Friend. Main Beach, Queensland, Australia. |
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| Orchid Accessories ENGLISH
Diverse selection of orchid growing products offered. Middleton Cheney, Banbury, Oxfordshire, United Kingdom. |
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