keiki

A keiki is an adventitious plantlet that develops on the stem or cane of a mature orchid, typically after the plant has flowered. The term comes from Hawaiian and means "child" or "little one". Unlike a seedling, which results from sexual reproduction, a keiki is a genetic clone of its parent plant, making it valuable for propagating orchids with proven flowering characteristics and color.

Keikis form most reliably on sympodial orchids such as Dendrobium species, though they occasionally appear on monopodial types like Phalaenopsis. They emerge from dormant buds along the stem or from the base of spent flower spikes. The plantlet develops its own small root system while still attached to the parent, drawing moisture and nutrients from the connection until separation. Some growers deliberately trigger keiki production by applying cytokinin-based growth regulators to dormant nodes, though environmental stress such as extended cool nights can also stimulate formation.

Propagation and timing

A keiki typically requires four to eight months to develop viable roots of 1 to 2 inches in length before it can be safely removed from the parent cane. Separation should occur only when roots are clearly emerged and somewhat woody; premature detachment results in high mortality. Once removed, the young plant requires humid conditions and careful watering for the first growing season as its root system is shallow and easily damaged.

The commercial appeal of keikis lies in the time saved compared to raising orchids from seed, which can take five to seven years to reach flowering size. A keiki may flower within two to three years of rooting and establishment. This makes keiki propagation valuable for orchid nurseries and hobbyists working with rare or expensive cultivars where genetic preservation is important.

Growers should inspect keikis regularly for pest infestation and fungal rot at the attachment point, especially if environmental humidity is high. The connection between keiki and parent cane can become a site of bacterial or fungal entry if kept too wet or exposed to poor air circulation. Once detached and potted separately, a keiki follows standard orchid culture for its species.