Looks like you were feeding to much. You don't need to flush. You just add water when the soil is dry. Exactly how often to feed is a bit of a mystery and to solve it, people in these anonymous forums keep making up answers like, "feed like this schedule," or "feed and flush rotating the weeks and that will work." We can that this info doesn't work. Don't treat these plants much different than the average houseplant. There's been alot of bad info roaming around the web for years. Here's an example: in the 1990's, it was said that you should stick your plant's stem with a tack. The reasons were because it would stress the plant and make it grow better (not true), and that the steel of the pin would add necessary metals, also improving the health of the plant (not true either). Then there was the idea of making your plants female by using human birth control pills. The idea here was to steal your sister's or girlfriend's birth control pills, crush them into pieces and sprinkle this on the plant. The reason being that since it was female hormone, it would make your plants female. Plants have hormones but not like people. Following that feeding schedule you have overferted that one plant. Only fert if the plant looks a little light green. Only water when the soil is dry. Or try hydro. Build a bubble bucket or oxypot, same thing. Pretty easy to do and get a pH/TDS meter. This will give you a little more control and involvement. pH around 5.9 and TDS (PPM) around 700 to start a clone and take it some from there as the plant grows. Check out the youtube videos on how to do this and make this stuff. Some great videos out there. Mr Green How to Build a Basic Indoor Weed Grow Room - Step by Step Construction Guide (1 of 9) - YouTube