Purple Kush

i am really sorry but i dont expect to much from this girls. there is so much that could have gone wrong.difficult to say exactly what the problem is in this case. we will need much more info to do that. is this your first grow? and why did you cut it's leaves? if it is your first time then i would not do autoflowers. instead use regular or feminized seeds. this way you can practice on them in veg and put them in flower when they are big enough. thats how i would do it. i do wish you the best of luck!! happy growing mate!

Hard to say but i would suggest spinnercaribbean is right. Check the ph of your outcoming drain after watering 👍 Unfortunaly your autos are really small, you cant exept a good harvest. 🤷‍♂️

It could be due to multiple things but it makes me thinks of a PH issue. Did you buffered your clay balls with the good PH ? If not then you could have a PH fluctuation issue.