You are allowed to own 25g in addition to 3 plants. They are very much aware that the ungarnered yield and the plant itself likely puts you over the 25g limit a

You are allowed to own 25g in addition to 3 plants. They are very much aware that the ungarnered yield and the plant itself likely puts you over the 25g limit as this is explicitly mentioned in the elaborative part of the draft document. You are supposed to gradually harvest from the plants what you intend to consume, just keep the amount of produce at hand below 25g. (I don't know how sensible that is, I have no experience growing cannabis.) My suggestion is if you happen to exceed the 25g you can always simply destroy the excess.