I have had major depression and post traumatic stress disorder more most of my life. When I was 19 I started on Zoloft of course, this was back in 1993 and there were not so many new treatments for depression as there are now.
The funny thing with taking an antidepressant is you reach a period of time where your actually feeling better. Maybe perhaps that you can go without the antidepressant and manage your depression on your own.
I did stop my Zoloft several different times for various reasons. But I always had that slide right back down into depression. Sometimes it would take months and others it would be weeks. I did try St. Johns Wort during one of these times I was off my antidepressant. Truthfully, I didn't feel any benefit from it what so ever, I tried it for well over a month.
I do believe that herbal supplements can help some people. The factors to weigh in on this would be what type of depression your dealing with and how severe it is. Plus, always get your doctors input on taking any kind of herbal supplement. Though these are not regulated by the FDA like antidepressants and other behind the counter medications they can be just as dangerous.