Propagation protocol for weakstem peperomia (Peperomia cookiana) and Oahu peperomia (Peperomia oahuensis) using whole leaf cuttings

Abstract

We present our technique for propagating weakstem (Peperomia cookiana C. DC. [Piperaceae]) and Oahu peperomia (P. oahuensis C. DC.) from whole leaf cuttings. Results from our studies indicate a high rooting percentage of cuttings (97.5%) in both species. The application of 1000 ppm indole-3-butyric acid did not improve rooting percentage in both species, but it improved root numbers and longest root lengths of Oahu peperomia. To propagate both species, we recommend burying less than 1/3 of the leaf in either a 1:1 mix of perlite and vermiculite (if under mist) or calcined clay (if subirrigated). To avoid rotting, the mist frequency or water level (for subirrigated conditions) should be just enough to keep the medium moist but not wet. Once rooting has occurred (34–41 d after planting), cuttings should be potted and placed under shaded sprinkler irrigation. Weakstem and Oahu peperomia plantlets, 2 to 3 cm (0.79–1.18 in) in diameter, can be generated from whole leaf cuttings approximately 2 to 3 mo after rooting.