I was just given two bags of irises. (Someone didn't want them and dug them up!) They've still got the foliage. Can I plant them now or do I need to store them somewhere dry and plant them at a later date? Should I take off the foliage before I plant them, or should I stick them in the ground as they are? And, most importantly: how deep should irises be planted? Thanks in advance to any responders!