I had no issues and never fed more then a cup per 5 gallon but it was expected to rain 25-30mm and hauling water to my plants 10 gallons at a time is close to impossible considering the terrains and the distance between patches and water source. My tarps and water holes were completely dry so I hauled in a 10x concentrate and fed two cups each expecting the forecasted rain would dilute it out quickly let to have the rain stop and we only got maybe 2-3 mm of rain....been a crazy summer, I think there may be a few issues at hand. The single leaves look like reveg for sure, they aren't drying up like you speak of but I definitely overdid it that one feeding. I need to work on a pump to fill tarps next year, I got them out way too late, live and learn I guess.