Dried flowering tops. These are then broken up into crumb sized pieces and weighed for tisane.
You are aware that the St.John's wort screws up other medications ? and since we don't know a) why you need it, depression, feeling low, seratonin, bipolar or diarrhoea or wound healing b) what physical and mental state you (or the person intending to take it) is in, c) what else you (or the other person) might be suffering from and d) where your St.John's wort is growing and how far along it is in it's growth cycle.....tbh, I can't see anyone happily saying, "Oh you take this much this often", with this herb from fresh. Slightly different with processed hypericum in tablets.
I grow it, and I use it, and not only for dye, but I wouldn't happily dose anyone else.
Link to UKPatient.
ttp://www.patient.co.uk/doctor/st-johns-wort
cheers,
M