I have a newly planted Magnolia x soulangeana 'rustica rubia' approx 5ft high. It is very leggy, not having a main trunk like others , 7 or 8 branches starting 10- 12 inches from the ground . Could someone tell me the procedure for pruning please as we are having very high winds at the moment and i'm worried the branches may snap. The very healthy "water shoots"do need removing too don't they??