I often need to foliar feed for some nutritional deficiency (N, Fe, Mg mainly). I often do not have commercial spreader/sticker near by.

Is liquid dish detergent OK, or does it stress plants? (Not dishwasher detergent.)

I know true soap (Na-organic) or Safer's insecticidal soap (K-organic) would be OK, but the former is inconvenient (bar) and the latter smelly.

So, is a small amount of dish DETERGENT generally OK? I ask because sometimes I see what seems to be a bit of stress, but it could easily be from something else.