ok ......1 u have red stem ...............u are lacking in NPK one of those.............2nd i see what u are talking about but do this right let it go for a week 10 days if it is male u will see the flower start then u know it male for sure ...........and do not forget u could have a hermi so let the flowering start..........u will see the different shape and get the male out of there before the pollen sacks open so u are safe