WELCOME TO THE
Denver Orchid Society
Founded in 1951, the Denver Orchid Society hosts monthly meetings featuring educational programs by local and national orchid experts. Members have the opportunity to see flowering orchids from private collections throughout the region and also purchase affordable orchid plants.
Cultivating a Passion for Orchids Since 1951
Discover the fascinating world of orchids. From their origins to the intricate cultivation techniques, we are here to share our passion and knowledge with you. Join us in exploring the beauty and diversity of these exquisite flowers.
Join the Denver Orchid Society
Become a Member
Anyone with an interest in orchids may join the Denver Orchid Society.
Single membership
$35
Dual/household membership
$45
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Click Through The Calendar to See Our Upcoming Events
Guests and interested individuals are always welcome at any regular meeting, but non-members should not attend more than two meetings in a calendar year without paying for a membership. The Annual Meeting (December) is open only to members.
General Information for DOS Meetings
The Denver Orchid Society meets on the 2nd Tuesday of every month, with the exception of a winter break in January and February. Our meetings include a short business discussion, an informal show-and-tell, an expert speaker orchid presentation, and the sale of orchid plants.
We currently meet at Denver Botanic Gardens (DBG) in Sturm Hall inside the Freyer - Newman Center.
Tim Culbertson
Catasetums
November 11th, 2026.
Denver Botanic Gardens. Gates Hall. 7 pm.
Since I was young, one of my passions has always been plants. I began growing orchids in high school, and expanded my collection as an offshoot from working at Longwood Gardens in Philadelphia just after college. From the very beginning it was all about Paphs, particularly awarded and select clones of historic importance, of which my collection numbers in the thousands. While I love finding old, rare stepping stones in paph breeding, I also do a little hybridizing of my own, and growing and flowering my hybrids is very exciting. I was once the youngest accredited judge with the American Orchid Society, and have been a judge now for 20 years; I have served in various capacities with various orchid societies in California and on the East Coast. Recently, I’ve partnered with Fred Clarke to greatly expand the selection of paphs at Sunset Valley Orchids through the acquisition of significant parts of Sam Tsui’s collection at Orchid Inn. I currently manage the Paphs at SVO, and do hybridizing in a wide range of genera including Cattleya, Catasetinae and Masdevallia. I love meeting other people who like orchids too, and doing so often finds me traveling to shows, vendors, and peoples’ greenhouses to see the latest and greatest in new hybrids and species. I like to be involved in plants as much as possible: in addition to Longwood, I’ve worked at the Smithsonian Institution tending to their orchids, and for years for the United States National Arboretum, collecting rare non-orchid plants and documenting cultivated species and hybrids for their herbarium. In short, I really like plants of all kinds.
I love Catasetums! They are fantastic plants, with an incredible diversity in colors and forms. At SVO, we understand that growing space is limited, so we are working hard to produce the best miniature Catasetums available. This presentation includes some of the important parents in miniature Catasetum breeding, interesting directions for intergenerics, wonderful photos of the pathway we’ve taken to achieve miniature results, some natural history of this incredible alliance, and lots of information on Catasetum culture. ! By the end of this presentation, you will have a new appreciation of their beautiful flowers and ease-of-growth. I will have lots of plants of this alliance for sale.
I love Catasetums! They are fantastic plants, with an incredible diversity in colors and forms. At SVO, we understand that growing space is limited, so we are working hard to produce the best miniature Catasetums available. This presentation includes some of the important parents in miniature Catasetum breeding, interesting directions for intergenerics, wonderful photos of the pathway we’ve taken to achieve miniature results, some natural history of this incredible alliance, and lots of information on Catasetum culture. ! By the end of this presentation, you will have a new appreciation of their beautiful flowers and ease-of-growth. I will have lots of plants of this alliance for sale.
Spring Orchid Show and Sale!
Rainforest Retreat
April 25 & 26, 2026
Denver Botani Gardens
Mitchell Hall
1007 York Street
Denver, CO 80206
Saturday 10 am - 5 pm
Sunday 9 am - 4 pm
The Denver Orchid Society is a not-for-profit, 501C-3 organization. The spring show and sale is a fundraiser for the group.
Orchid Care
Orchids are not difficult to grow, but you don’t grow them like most houseplants. A free guide is available illustrating orchid requirements regarding potting medium, temperature, fertilizing, air movement, watering, and more. To get your free guide click on the following link to tell us where to send your copy.
Get your Free Illustrated Guide to Orchid Care:
Learn More About the Denver Orchid Society
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Contact Us
Let us know what you need and we'll be happy to assist you. Don't hesitate to contact us for any inquiries, orders, or information about our services.
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Learn About Orchids
We’ve collected useful tips across the web and you can also learn about a particular orchid plant by just doing a search on its name.
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Become a Member
Become a member of the Denver Orchid Society and gain access to exclusive events, expert talks, and a vibrant community of orchid enthusiasts.
FAQs
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The Denver Orchid Society is a community of orchid enthusiasts dedicated to growing, learning about, and sharing knowledge of orchids. We host meetings, educational programs, and annual orchid shows to promote appreciation for these beautiful plants.
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Absolutely! Our society welcomes orchid lovers of all experience levels, from beginners to expert growers. We offer resources, mentorship, and guidance to help new members successfully grow orchids.
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Our meetings are typically held once a month at the Denver Botanic Gardens. We feature guest speakers, orchid care workshops, and opportunities to connect with other orchid enthusiasts. Check our Events page for the latest schedule.
View Our Upcoming Events -
Joining is easy! You can sign up online through our Membership page or attend a meeting to register in person. Membership benefits include access to exclusive workshops, plant sales, and participation in our annual orchid show.
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Many orchids can thrive in Colorado with the right care, including Phalaenopsis, Cattleyas, Paphiopedilums, and certain Dendrobiums. We provide guidance on adapting orchids to our unique climate and growing conditions.
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Yes! We host two, annual orchid shows. One in the spring and one in the fall featuring stunning displays, and opportunities to buy orchids and supplies. Stay tuned to our website for details on upcoming shows and events.
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Yes! There are native orchids in every continent except Antarctica. And Colorado boasts over 20 species of native, hardy orchids found growing from the plains, all the way up into the mountains.
Contact us.
Have questions or want to learn more about the Denver Orchid Society? We’d love to hear from you! Whether you’re interested in membership, upcoming events, or just want to chat about orchids, our team is here to help.
Feel free to reach out using this form. We look forward to connecting with you!