Idaho Botanical Garden

Idaho Botanical Garden is a nonprofit botanical garden in Boise, Idaho, located in the historic Old Idaho Penitentiary District. Its collections and educational programs are oriented toward the high-desert and sagebrush-steppe conditions of the Treasure Valley, with an emphasis on plants that are native, water-wise, resilient, habitat-supporting, or otherwise well adapted to the region. The Garden occupies approximately 15 acres within a larger historic penitentiary property and functions both as a horticultural institution and as a public gathering place. The site has an unusual connection to Boise history. Until the Old Idaho State Penitentiary closed in 1973, portions of the property were used as the prison’s farm and nursery. The land subsequently remained largely inactive for more than a decade. In 1984, botanist Dr. Christopher Davidson and a board of directors began developing a botanical garden on a leased 42-acre portion of the historic grounds. Early work included establishing infrastructure and installing irrigation capable of supporting a cultivated collection in a dry climate. The garden later developed into a public institution with specialized display gardens, interpretive features, youth programming, seasonal events, and a venue for outdoor performances. Its gardens represent several complementary themes. The Idaho Native Plant Garden presents native grasses, forbs, trees, shrubs, and wetland plants from the state, while the Lewis and Clark Native Plant Garden interprets species collected during the 1804–1806 expedition and organizes them around canyon, prairie, mountain, and wetland environments. The Western Waterwise Garden demonstrates drought-tolerant plants suitable for western landscapes. The Firewise Garden, developed with the Bureau of Land Management and College of Western Idaho’s horticulture program, focuses on fire-resistant plants and landscape approaches for wildfire mitigation. A separate Water Conservation Landscape demonstrates attractive, water-efficient planting along the entrance route. Other spaces broaden the visitor experience. The Muriel and Diana Kirk English Garden, designed by landscape architect John Brookes, combines large perennial groupings with historic architecture and opened in 1998. The Rose Garden includes antique roses and newer varieties, and the Herb Garden explores plants used in cooking, medicine, cosmetics, and decoration. The Meditation Garden offers shade, water, and mature plantings connected to the former prison nursery. The Children’s Adventure Garden uses play structures, a treehouse, a sensory garden, a musical trail, a kitchen garden, and interactive plant displays to connect children with nature. The Garden’s public role extends beyond horticultural display. It offers school field trips, youth camps, education trunks, adult classes, guided walks, workshops, plant sales, art exhibitions, family events, and seasonal celebrations. Great Garden Escape is its recurring summer concert series, while Outlaw Field operates as an outdoor concert venue with capacity for approximately 4,000 people and has hosted touring performers. Other recurring activities include the Harvest Festival, Winter Garden aGlow, Bug Day, Scarecrow Stroll, and related community programming. As a 501(c)(3) nonprofit, Idaho Botanical Garden does not rely on regular government operating funds. Its revenue model combines donations, grants, admission, memberships, special-event fundraising, plant sales, sponsorships, and community partnerships. The organization’s positioning is therefore both educational and civic: it preserves and interprets regional botanical knowledge, demonstrates practical responses to water scarcity and wildfire, supports environmental learning, and provides a distinctive cultural venue for Boise.

The Idaho Botanical Garden occupies land with a layered agricultural, institutional, and horticultural history. Before the Garden was established, the site formed part of the Old Idaho State Penitentiary complex in Boise. The penitentiary used portions of the property as a farm and nursery, and some mature trees in what is now the Meditation Garden date from the period when minimum-security inmates worked in the nursery. The prison closed in 1973, after which the grounds were inactive for more than a decade. In 1984, botanist Dr. Christopher Davidson and an initial board of directors began creating a botanical garden on a leased 42-acre area within the historic property. Development required basic infrastructure as well as a reliable irrigation system for cultivated plants in Boise’s dry, high-desert climate. The Garden gradually evolved from a developing plant collection into a public nonprofit devoted to connecting people, plants, and nature and to promoting environmental stewardship. The institution expanded its horticultural scope through gardens representing Idaho’s native flora, regional water conservation, ornamental horticulture, herbs, roses, children’s learning, and broader western ecology. The Rose Garden opened in 1989, and the Idaho Native Plant Garden was developed in partnership with the Pahove Chapter of the Idaho Native Plant Society around 1990, with completion noted in 1994. The Herb Garden was developed in the early 1990s. These spaces established the Garden’s dual identity as a regional plant collection and an interpretive institution. The Muriel and Diana Kirk English Garden opened in 1998. Designed by English landscape architect John Brookes, it uses perennial plantings against the wall of the Old Idaho State Penitentiary and includes a historic-style summer house and a fountain dedicated to Diana, Princess of Wales. The Garden later added a one-acre Water Conservation Landscape in 2006 and opened the Lewis and Clark Native Plant Garden in May of that year. The latter interprets plants associated with the Lewis and Clark Expedition through canyon, prairie, mountain, and wetland zones, while also addressing Indigenous knowledge and contributions to the expedition’s success. The Children’s Adventure Garden became a major educational space, combining nature-based play with a treehouse, sensory planting, a musical trail, a kitchen garden, and facilitated learning programs. The Garden also developed demonstration areas focused on practical environmental challenges. The Western Waterwise Garden promotes drought-tolerant landscaping, and the Firewise Garden demonstrates fire-resistant planting and wildfire-mitigation approaches through partnerships involving the Bureau of Land Management, College of Western Idaho, and Idaho Botanical Garden. Since 2012, the Garden has displayed Plant Select plants selected for characteristics such as low water needs, durability, habitat value, disease and insect resistance, and non-invasiveness. In 2018 it became a licensed propagator, allowing it to grow selected plants for its own use and public sales. The Plant Select demonstration area is no longer accessible to the public, but the propagation and plant-sale activity reflects the Garden’s broader effort to connect demonstration horticulture with household gardening. The Garden’s cultural and civic programming has expanded alongside its plant collections. It hosts concerts, art installations, workshops, guided walks, youth programs, school visits, family events, and seasonal celebrations. Great Garden Escape brings summer music to the Meditation Garden, while Outlaw Field provides a larger outdoor performance venue. The organization is funded through admissions, memberships, donations, grants, plant sales, special events, sponsorships, and partnerships rather than regular government operating support. Today it remains an active Boise nonprofit combining horticulture, public education, ecological interpretation, recreation, and community events.

• 2018

  Licensed Plant Select propagator

  [1]Idaho Botanical Gardenen.wikipedia.org

  The Garden became licensed to propagate selected Plant Select plants for its collections and public sales.

• 2012

  Plant Select demonstration begins

  [1]Idaho Botanical Gardenen.wikipedia.org

  The Garden began displaying Plant Select plants selected for resilience and suitability to challenging western conditions.

• 2006

  Lewis and Clark Native Plant Garden opens

  [1]Idaho Botanical Gardenen.wikipedia.org

  The Garden opened an interpretive native-plant landscape marking the expedition bicentennial.

• 1998

  English Garden opens

  [1]Idaho Botanical Gardenen.wikipedia.org

  The Muriel and Diana Kirk English Garden opened with a design by John Brookes and more than 1,300 perennial plants.

• 1994

  Idaho Native Plant Garden completed

  [1]Idaho Botanical Gardenen.wikipedia.org

  The native plant display was completed with representative desert, woodland, grassland, and wetland species.

• 1990

  Native plant partnership begins

  [1]Idaho Botanical Gardenen.wikipedia.org

  The Garden and the Pahove Chapter of the Idaho Native Plant Society began developing the Idaho Native Plant Garden.

• 1989

  Rose Garden opens

  [1]Idaho Botanical Gardenen.wikipedia.org

  The Rose Garden was established with antique and modern roses and regional stonework.

• 1984

  Garden development begins

  [1]Idaho Botanical Gardenen.wikipedia.org

  Dr. Christopher Davidson and a board of directors began establishing the Idaho Botanical Garden on leased historic grounds.

• 1973

  Old Idaho State Penitentiary closes

  [1]Idaho Botanical Gardenen.wikipedia.org

  The former prison site ceased operating as a penitentiary, leaving the future Garden property inactive for more than a decade.

A regional botanical and environmental-education institution focused on resilient plants, water-wise gardening, native ecosystems, community learning, and cultural events in Boise.

• Horticultural display · 1984

  Botanical plant collections

  The Garden maintains cultivated collections organized around Idaho native plants, western water-wise horticulture, roses, herbs, perennials, vegetables, shade plants, and other regionally relevant species. The collections are presented as living interpretation rather than as a commercial product line, allowing visitors to compare planting styles and ecological adaptations in Boise’s dry climate.

• Plant sale and propagation · 2018

  Plant Select propagated plants

  Through its Plant Select relationship, the Garden propagates selected plants chosen for qualities including low water demand, resilience, habitat value, disease and insect resistance, long-lasting appearance, and non-invasiveness. These plants support the Garden’s displays and may be offered through annual public plant sales.

• Education

  Environmental education programs

  Educational offerings include facilitated school field trips, youth nature programs, summer STEAM camps, education trunks for schools, adult workshops, guided walks, and classes on gardening, ecology, landscape design, and sustainable practices. The Children’s Adventure Garden provides the principal hands-on setting for many youth activities.

• Cultural programming

  Outdoor concerts and events

  The Garden presents seasonal and cultural programming including the Great Garden Escape concert series, performances at Outlaw Field, art exhibitions, family activities, the Harvest Festival, and Winter Garden aGlow. These events extend the institution’s role beyond horticulture and provide important public engagement and fundraising opportunities.

• Great Garden Escape

  Boise · United States

  An annual summer concert series held in the Garden, generally in the Meditation Garden, combining live music with an outdoor garden setting and picnic-style attendance.

  Outcome. Recurring community and fundraising programming; specific attendance and financial outcomes are not stated.

  Source
• Winter Garden aGlow

  Boise · United States

  A seasonal winter event that uses the Garden as a setting for illuminated displays and family-oriented programming.

  Outcome. Established as one of the Garden’s best-known recurring public events; quantitative results are not stated.

  Source
• Firewise Garden partnership

  Idaho · United States

  A collaborative demonstration garden involving Idaho Botanical Garden, the Bureau of Land Management, College of Western Idaho’s horticulture program, and Idaho Firewise, focused on wildfire-resilient planting.

  Outcome. Created a public educational display of more than 300 plant species and fire-mitigation techniques.

  Source

• 2018

  Become a licensed Plant Select propagatorStrategy

  Background

  The Garden had showcased Plant Select plants since 2012 and sought to connect regional demonstration horticulture with public access to suitable plants.

  Action taken

  It obtained a license to propagate selected Plant Select plants for Garden use and public sale.

  Aftermath

  The program supported the Garden’s plant collections and annual plant-sale activities; specific financial effects are not stated.

  Source

• 1984

  Develop a botanical garden on historic penitentiary landStrategy

  Background

  The former penitentiary property had remained dormant after the prison closed, while Boise lacked a public institution focused on regional horticulture and environmental learning.

  Action taken

  Dr. Christopher Davidson and a board of directors began building a nonprofit garden on a leased portion of the site, including irrigation and foundational infrastructure.

  Aftermath

  The project grew into a multi-garden public institution and community venue.

  Source

1. 1Idaho Botanical Gardenen.wikipedia.org
2. 2Idaho Botanical Garden official websiteidahobotanicalgarden.org
3. 3Idaho Firewiseidahofirewise.org