Newbie here :) Glancing through Ted Green's website, he mentions some Hoya that like limestone in the soil. Do any of you add limestone? If so, where do you find limestone to add? just curious, thanks!
Do you add limestone for any of your hoyas?
This question has been asked some time before. I can't remember which ones were the ones most responsive to it. I add well decomposed poultry manure, guess that should have some calcium in it. Otherwise agricultural lime would do it, and that's usually available at most nursery/plant outlets.