i used H&G for soil...i had the same result, i found that it was too strong in N, leaving my plants too dark green and then too much N will lower ph and fuck with other nutes...
H&G said to feed every time with their lineup @ recomended dose, when i complained to them , their response was maybe my plants were hungry and i should feed more lol...i just flushed and fed once every 3 waterings and i was able to save my crop...but it was the first and last time i used H&G
of the big hydro nute companies, i have tried AN, H&G, and GH...(each one used whole line up...)..H&G was the worst, GH did the best and was the most consistent....that being said i still prefer my dry salt powders