Total novice...please be gentle 
I have a lovely Lupin (Masterpiece, if that matters?). It did very well for the first few weeks but now the flowers closest to the bottom of the stem are going brown and crispy and dying off. Is this normal? Some of the leaves are looking a bit brown as well so I've snipped them off. It's in well drained soil, well watered with plenty of sun.
I'm wondering if this is a normal part of the life cycle or if it's a bit poorly. Any advice gratefully appreciated.