Plants vs. Me

I like plants but they do not seem to like me. My MIL gave me a few pots of her euphorbia plants which I keep on our balcony. She said that they can survive even if I just water them once a week. So far, I've managed to kill two. TWO! When in fact they are succulents and can retain water. Sadly, the plants are mysteriously drying up on me. More curiously, the plants that died were located in the same spot, but the other plants are thriving.

So... here's my new plant, a cactus.



If I still manage to kill it, then I'm giving up.