AsNoriuanswered grow question 3 years ago I see some small curling, so maybe it's good to back off a bit for a week or so with veg nutes, they mostly N, and I see small sighns of toxicity, but you need to feed them veg nutes up to 5-7 week of flower, it depends on strain, but people cut off totally Nitrogen from feeds 3-4 weeks before harvest.
All nute companies have feed plans, use them as guidelines.
All the Best !