I have a one year old Caragana Walker that was doing wonderful through the first summer, got damaged over the winter resulting in losing 2 branches and another one tied up a this point. It has leafed out but the color is a lime green; very weak color as to what I remember from last year. No blossoms yet. Does it need fertilizer? Also, it has shoots coming up from it's base. Should I let them go to form a bush, cut back in case they are suckers? I have even thought if the original tree is going die maybe my best bet is to let these shoots take over.