as said many times above, its not down to us. me personally, im sickened by the claims culture "you looked at me funny so im going to sue you cos its always worth trying as i wont lose a penny if i lose" - not at all saying this is your case tho mate in fact IMO it isnt. if there is a dangerous plant that is commonly known to cause skin problems like yours standing around with no warning then that is a gross oversight on the part of whoever put it there/bought it. this is the difference between signs saying "dont walk into this wall / dont fall over" and "this tree will hurt you if you touch it". you can have a stiff upper lip and put it down to experience, you can complain to them but not sue, or you can go the whole way.