The Keiki Formation and the Flowering of Pseudobulb of Dendrobium johannis Rchb. f.

Dendrobium johannis Rchb.f. is an endemic orchid and has been cultivated in Merauke with conventional cultivation techniques through the separation of its clumps and tillers which requires 2–3 months to grow. Accelerating the Keiki formation can be applicated with an organic PGR (plant growth regulators) such as coconut water. This study was aimed to determine the effect of immersion time in several concentration levels of coconut water on the Keiki formation and pseudobulbs flowering in Johannis orchids. The study used randomized block design with two factors (the time of pseudobulb immersion in coconut water and its concentrations) with three replications. The result showed that interactions do not affect to Keiki formation and vegetative growth, but significantly affect the generative growth. The best treatment to increase the number of flower bud per stalk of the inflorescence is 4 hours soaking time with 500 ml l⁻¹ concentration which generated 2.67 flower buds.