In the upper left hand corner, click on 'forums' then you should see a long list of separate forums or categories of subjects. I think the first one is All Things Plants. (Maybe they are alphabetical, I can't remember now). Just click on any forum you are interested in. For instance Roses. If you want to add the forum to your watch list, click on the upper RIGHT hand corner where it stays "Watch this forum". Or you can watch individual threads also, by clicking on a thread, and clicking "watch this thread'. You will then be notified if that thread gets replies.