Perhaps nute lock out, or possibly nute burn. I'm guessing the miracle grow soil you used feeds plants over time? Should say so on the bag.. also hopefully you're not adding any extra nutes when you're watering. What was the root structure like when you received the clone? And how long was the clone given to grow roots before you transplanted into the 5 gallon bucket?

You need to cover that thing with some sort of humidity tent or lightly mist it if the roots aren't fully developed. Also its too late now but that 5 gallon bucket is way too large of a container for that clone, transplanting isn't a bad thing if you do it properly.

Bottom line is... I think you've lost this thing unless you know for a fact it has a strong root system hidden in there somewhere, then you could possibly revive it but I wouldn't count on it. Clones can be very sensitive until they've thoroughly settled in. Just make sure that next time you try it you use a neutral soil that doesn't feed your plants, and also make sure that you test the ph properly. Without knowing your soils PH level it can be very difficult to diagnose plant problems. Feel free to reply or msg me with any more questions you might have. I'm not a full on veteran professional grower but I'll help where I can and won't recommend doing anything that I am not sure of in the first place. Good luck!
Minnesnowta Reviewed by Minnesnowta on . my JR. plant doesnt look very well i just bought a OG kush clone about a week ago from a friend. she is about 5.5 inches tall and she doesnt look very well.....for info...she is in a normal 5 gallon bucket with holes drilled at the bottom for drainage. the bucket is filled with miracle grow premium potting soil. there are three 100 watt cfl light bulbs suspended with yarn about 6 or 7 inches abover her the room temp is kept relatively constant with maybe a very small change in the night exact temperature unknown but im positive Rating: 5