hey dude, im just using normal compost out of a bag not sure what type at all sorry. i would say there bout 5 weeks old and there finaly gettin biger buds jus seems so slow watching them grow they are about 16 inches tall im hoping they wont get much bigger as i will run out of space, there starting to smell abit now i will update picture when buds grow, i seem to have like rusty coloured patches on the lower fan leaves any idea ???