I'm not an 'i told ya so' kinda guy ...
I just wanted to point out that I mentioned a few weeks ago the leaves were too dark green and that grow being added anywhere past Week 2 could be the cause due to too much N, possible lockout even. Nice to hear the CEO of Dyna Gro agrees with me, I guess. LOL
The reason why there can easily be too much Nitrogen, is that the nutrient is so vital in it's ability to be broken down and used for creating new vegetatitive growth. Unfort, N is not used in large quantities for Bud Growth. Mainly just leaves, stem/stalk, new branching. While it needs to be present for proper growth during Flower, your vertical growth, branching, ... pretty much stops after the plant is 2-3 weeks into Flower, and it no longer requires anywhere near those higher N levels it once did. People laugh when I said I'm doing a PK spike during flowering and are like, I don't do that my plants need N, too! Well, yes. But in low doses. My Kushie Kush was actually prob my fav ratio and worked better than other nutes towards the end of flowering when I do PK spikes, which consisted of a ratio of 1-7-17. Too much N at the end of flowering will also prevent them from being able to properly autumn off (yellow) and break down the plants chemical concentration so that it can decrease and taste/smoke better in the end.
And about foliar feeding. For those who choose to do this, you should highly consider lowering your hydro/soil feeds if you are going to feed the plant thru it's vegetation, as well, or you can easily burn even if levels thru both ends are ideal, as the overall qty used will still add up to be too much in the end.
***Sorry homebrewer, I didn't mean to make such a big post on some stuff that at times can seem Cannabis101, but I felt it was relevent to bring up again since we're discussing your plants condition, Nitrogen toxicity, what DG CEO said, ...