My seven year old Hoya kerrii IML 0784 (Pubescent Leaf Form) was four feet tall and flawless. I brought it in to my work place and put it on a windowsill with southern exposure and the sun destroyed the plant by blistering most of the leaves. The blisters were in the form of large cork-like growths that were completely unsightly and necessitated starting the plant over again. I started 3 cuttings, of which I sold two and kept the worst of the 3 for my self. The plant has done well and flowered within two years of starting it over. Glad to have my plant back again with beautiful leaves.
I had always heard that Hoya kerrii can take and appreciates full sun. I can tell you that is completely untrue at least for Hoya kerrii IML 0784.