Well a good hang dry really is the best cure. Just supposed to do it in a 60% humid/60F degree F temp environment, somewhere around that anyways. 10 days with good good control is best. Dry to fast they smell like grass/hay(is why I ask), dry to slow and you can get moldy weed. Curing is just proper storage to maintain the dry/cure longer. Some people swear the true smell and taste pop out later. While probably true, the hang dry is still super important to get the first proper smells and tastes to come out.
So that's what I got on your grass smell/taste weed.
...Idk wtf is up with the color, that's kinda weird. Could be N, could be the dry idk... could be strains. Got a pick of your finished weed? Also those plants do not appear to have N toxicity. They just look healthy. I've smoked dark green weed that smelt and tasted glorious before, but if it starts lighter and turns dark, well that just weird, somethings off.