nutrients are lmited by the light you give.. youf eed to match light. you can't boost it. only give it optimal amounts...
what's optimal? within reason, anything that doesn't give it a toxicity, lol... and doesn't cause deficiencies. no pill to give or button to push here, unfortunately to be barer of bad news.
it is getting more than 8 hours total, right? ~15 is safe to avoid bloom.. .14 will be cutting it close with some strains Some strains will definitely flower with 10 hours of darkness. just rhetorical in nature.