does the soil below them look disturbed? or does the area look like it has been used recently? make sure they arent someones babies before you take over. for the simple fact that, if you did all the work and spent the money, woulden't you be PISSED if someone took over your grow.
yea...there guna need nutes, something like a 25-10-15 for veg and a 10-25-15 for flowering, make sure you ease them into the plant alittle at the time, you dont want to stress them and slow growth, less is more when it comes to nutes.