The Rocky Mountain Bonsai Society

The Rocky Mountain Bonsai Society (RMBS) was founded in 1975 and has a proud lineage to the Denver Bonsai Club which was founded in 1945.  RMBS is a Denver Botanic Gardens (DBG) affiliated plant society and a society member of both the American Bonsai Society and Bonsai Clubs International.  For more information about RMBS’ history please refer to the History of the Rocky Mountain Bonsai Society.

Monthly meetings are typically held on the first Tuesday of each month from 7:00 thru 9:00 pm and held at the Denver Botanic Gardens’ Plant Society Building.  All the monthly meetings are open to the public. Nine months of the year, members meet for a Saturday workshop.  Most of the workshops are either at the Bill Hosokawa Bonsai Pavilion, or the Plant Society Building. 

Please check this link for more information on Bill Hosokawa's life and his numerous contributions. 

Annually, RMBS has a Bonsai Show at the Denver Botanic Gardens to display some of its member’s best bonsai trees for the public’s enjoyment.

2018 Programs, Monthly Meetings, Workshops, and Events
Monthly Meeting - April 3rd
Tuesday, April 3rd, - 6:30 - 9:00 PM
Denver Botanic Gardens
Gates Hall
1007 York Street; Denver, CO  80206
Main Program
Bonsai Pots; Types of Pots; How to Select a Pot for a Specific Tree: Group Discussion
" A large part of the art of Bonsai is the experience of a tree that has become detached from it's ground bondage and now lives a life in a pot.  It fascinates us"  Courtesy of Bonsai Empire.
Sex - The first thing you must do is to decide if your tree is masculine or feminine. 
Size - The pot should be of the same height as the trunk is wide above the nebari. Oval and rectangular pots are usually 2/3 of the trees height. Round or square pots is 1/3 the height of the tree - unless foliage is unusually large , then the pot is also becoming wider.
Design - The pots design should match the degree of masculinity or femininity of your tree. The closer you get, the more harmonious the experience of your final Bonsai.
RMBS Members  are encouraged to bring bonsai trees and pots for discussion.
Saturday Workshop - April 21st
Saturday, April 21st - 9:00 AM - 2:00 PM
RMBS Member (Adam Johnson) Home
Hands On Program (Please dress appropriately for changing weather
Repotting Worshop & Pot Sale
RMBS Members are encouraged  to bring their trees that they are intending to repot.  Also bring soil and other items necessary for repotting.

Nursery Stock Excursion - April 28th
Saturday, April 28th - 9:00 AM - Noon
Alameda Wholesale Nursery
1950 W. Dartmouth Ave
Englewood, CO

Program: Choosing Nursery Stock Field Trip
Darell Havener


April 28th
Saturday, April 28th, 2018
Denver Botanic Gardens
1007 York Street
Denver, CO  80206

Program: Beginning Bonsai
Hal Sasaki & Larry Jackel
Register here


Monthly Meeting - May 1st
Tuesday, May 1st, 2018 - 6:30 - 9:00 PM
Plant Society Building
Denver Botanic Gardens
1007 York Street
Denver, CO  80206

Short Program: Substrates for Bonsai
Jerry Morris

Long Program: Portulacaria Soils Study Results
Lou DeHerrera


Field Trip to Aspen, CO - May 5th
Saturday, May 5th - All Day
Meeting Place TBD
Aspen, CO

Program: Visit to 2,000 year old transplanted trees
Jerry Morris


Guest Artist - Todd Schlafer - May 19th
Saturday, May 19th - 9:00 AM - 4:00 PM
Plant Society Building
Denver Botanic Gardens
1007 York Street
Denver, CO  80206


Takayama Park Event - May 20th
Sunday, May 20th - 9:00 AM - 1:00 PM
Takayama Park
3700 Cherry Creek North Drive
Denver, CO 80209