Hoya benchaii is a great plant that is very similar to H. kloppenburgii. There is probably no reason to grow them both, unless you are an obsessed collector like myself. Despite my many difficulties over the years with the plant, now that I have a large specimen, it is quite striking and worth keeping. Here are the parameters to keep it happy. Grow it in coconut husk chips with a little pumice thrown in. Keep it in a clear orchid pot so watering can be more easily judged and pests discovered before too much damage is done. Keep it warm and humid, and if you are lucky it will eventually flower for you!