I was very lucky that my tiny two inch sprig perked up and began growing roots after a couple of weeks in water. I potted it into a 3 oz clear cup with holes drilled in the bottom, and used mostly coco chips with a little perlite for a substrate. This Hoya sat there not doing much of anything for what seemed like forever, but was probably a few months. It suddenly one day though started to start showing growth points and finally began to grow, albeit slowly.