when to change fertilizer

[emdsd40]

First off, thanks for the birthday wishes, my wife even forgot.
I sprouted 12 seeds, had 11 germinate and planted about 7 weeks ago. I turned the lights back to 14/10 twelve days ago when they got to be 16 inches tall and ended up with 5 female, 5 male(they are at the landfill) and one undecided. Now that i know they are female, when should i change the fertilizer from 20-20-20 to 15-30-15? This is not the best ratio but it was the closest i could find. I am quite happy with the results so far and do not want to ruin production now. Thanks Mike.

 

[Mutt]

can switch to your bloom fert now.
Those are some high nitrogen ratios for bloom.

 

[Alistair]

Yeah, that is rather high in nitrogen, but isn't it more important that the percentage of phosphorus is twice as much as the percentage of nitrogen?

 

[pcduck]

I always try to keep just enough N to keep them green. But then again whom am I to say.

Good luck on your grow