kush was my favorite strain i grew. unfortunately there is no way to estimate yeild just by knowing the strain. the light you are using is the most important factor to estimate yeild although there are many other factors to consider as well(growing method, nutes, space, even the experience of the grower). don't leave the male IT WILL NOT ENTICE THE FEMALE TO GROW BETTER! all it will do is eventually knock her up and ruin your grow. they do look good so keep it up. i grew master kush from nirvana. i got them down to 1 really great pheno pretty quickly(only 3 grows) i did find it to be a bit fussy as to feeding and very sensitive to ph. as long as you pay close attention to there needs they will reward you greatly!