What have ya got to lose? Real question is, Why is it deteriorating? Seems pointless to growplants for 3-4 weeks just to watch them crap out. Recreational growing is a waste of time, money, and a terribly big risk unless med legalized in your state. Slow deteriation.. Probably nutrient related but if its only 3-4 weeks old you should be able to save it.
Anyrate..., Some pics wouild be helpful and at the very least should you decide to clone it, Good Luck with your project and find out whats going on .