URGENT! Plant doctor needed.

I have a friend who got some seeds in his weed back near the start of the year so he decided to plant one and put it soil on his balcony in the uk weather. He watered with untreated water for months until the end of the summer. At which point in his infinite wisdom decided his plant was male i told him not to jump the gun and wait on determining the sex. So it was neglected, his friend destroyed the poor girl by hacking 3 of the lateral shoots (branches) to make canna butter even though in his mind it was male and not even into flower fuck knows where they get there info from. So i have the plant i took it from him. I want to know if can transplant this plant from soil to my DWC. Its in pre flower but in a bad way no nutes had been used and its tiny. Can i just cut the remaining 3 lateral shoots (branches) and re pot and root them individually like cloning and dump the roots of original. Get them into healthy veg state and then back to flower to produce some real green. As i am just rooting seeds atm this would fit in with my grow room and schedule. Or shall i just give up on it and flower it now? Thanks in advance i appreciate

No, don't give up. This will be a learning experience either way so get psyched about it and IMO take as many cuttings as you can to cut down on the attrition rate. Go for it.

Don,t cut them off you can transplant it then put it under 18/24 hrs light after 1 month it will be back in full vegitive growth. IMHO if you,re going to the trouble/expense then spend £20/30 and get some stable genetics or a clone from a friend, don,t think that if seeds are cheap there crap, just spend wisely atb TCD

why not just take some clones from that girl and save on the power and just start fresh meaning obviously plant is taller so clone the hell out of it and start fresh reverting back to veg and then flower in my mind is wasteing power think about it for a minute you can have a even canopy with seedlings and your clones you took
thats what i would do this way its all under 24 hrs of light ) `my thought tho

Thanks for the advice boys.