Some plants are trickier to water than others :) Also, it needs a re-potting and better light setup (it looks like some parts are getting too much light and others too little). This is a Sedum Morganianum aka Donkey or Burro's Tail. In the old location it was hanging from a hook and now it's just kind of draped over a shelf. When the leaves fall off as they do with each move and watering I just drop them back into the pot.
@plants The tray is a curved serving tray for what looks like banquets or catering. I got it at a thrift store for about 1€ and it works great for watering.
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