Hi, this is my first orchid, purchased last spring in full bloom. The blooms lasted until early summer. Some of the larger bottom leaves have withered, but I assumed that was normal. Over the summer what I thought were new aerial roots sprouted, but three of them turned out to be flower stocks. The buds have grown, but the first one turned from green to a parchment colour, and when I squeezed it, there was nothing inside. I'm afraid the remaining buds will be the same. The orchid is small and I have it in a ceramic bowl which has lots of holes, kind of like lace. I don't have it in any soil, just sphagnum moss. I test it every week for dryness, and when the top moss feels dry, I give it a bath in the bathroom sink for about 20 minutes. Now I'm wondering if the orchid doesn't get enough nutrients to properly form flowers. Can someone please help and let me know if I am doing something wrong? The orchid sits on a NW windowsill, where the temp. varies between 16-18 C.