I had the same experience as you that these small plants make big roots and after three weeks my Automatic Hindu Kush had outgrown 1 litre pots.
My experience with bone meal is that when used as a top dressing or even dug into the top layers of soil it always goes moldy with a white fuzzy mold. Even when boiled it still goes moldy but the tea didn't.
My Automatic Hindu Kush was 18" beneath my all blue ufo led light and I fell for the forums' maximum light hype and lowered the light to 14" and could see a bad reaction in the leaves so I raised it back to 18" again. Then I noticed the leaves bending down for several weeks like yours are and tried to figure out what was wrong. I kept getting the feeling the light was too bright and they were trying to avoid it. So I moved the light to 24" and within a day all the leaves were pointing upward towards the light. So I see in your photos the leaves bending down and wonder if you have too much light. Don't forget these genetics come from the land of the midnight sun and even though the sun is 23 hours, it is much weaker than equatorial sun. Even the afghanis in the background come from mountains where there is heavy cloud cover that restricts the light.
It seems curious and strange to me to meet someone from the other side of the world practially and you are just going into fall while we are just starting a glorious early spring thanks to El Nino.
Thanks for all the info - although the droopy leaves have got 80% better in the past 24 hours after their compost / guano tea
Today in Uruguay its definitely Autumn / Fall - wet and windy - a day to sit by the fire