If you want replies for this thread, you should post it in the growing section under absolute beginners. This section is for questions concerning homemade pipes and bongs and the like.
Your plant looks good. A little yellow. Could be too much water. Are you giving it any fertilizers? Looks like it's growing in a clear container. Is it? If so, not good. Roots don't like light. The brown spot could be anything from nutrient burn to rough handling. What strain is it? Bag seed? The close-up of the node shows it's still too young to determine sex.