The Hoya Krohniana species is from the Phillipines.
Soil
The Hoya krohniana plant enjoys being potted in a coarse and well draining soil. In its natural habitat, it grows on the surface of a plant or a tree and draws nutrients from the air, rain, water, or from debris accumulating around it.
Water
Watering for Hoya krohniana care primarily depends on its location and environment.
The Hoya krohniana hails from warm and wet forests in Asia. This species likes it comparatively moist even with its succulence. But too wet can lead to root rot before you even notice. Water when the soil is dry.