no ex. in the papaya strains. dont keep only the tallest plants because males tend to grow a little bit taller tha females so you will want to keep a little of both short and tall to make sure you get a few females. bloom solutions wont make the plants show their sex quicker, its just used to make the flowers mature faster so the plant can produce as many flowers as poss. befor harvest. hope this helps and if you have any more Q's just post it. Peace.