i dont think it matters from where ur from to beable to grow weed
i just read that manure can be a great natural source of nitrogen.. maybe chicken's or goats poo are good one's to use.. you have to be very careful adding straight manure to your soil as it can burn your plants.. maybe you could find an old poo somewhere in the soil where its already had a chance to breakdown some, and use that soil, just add a lil on the top of your soil.. i am not sure how you go about using poo for fertilizer that's for sure, i would really suggest that you use google and read up on the best methods of using it.. you could also just google nitrogen sources for plants and see what pop's up..
hope that helps you out some.. i don't want to tell you the wrong thing and end up killing your plants... that is awesome that you are the only one who is attempting to grow, many kudos.. good luck with the grow .. just like i said, look up good natural sources of food for plants and i think you will find lots of good info.. it just sounds like they maybe a lil hungry to me.. i also saw that bat guano, or bat poop, is a good source of nitrogen for plants, but i am not sure if you will be able to find bat guano where you are..
best of luck though m8, much respect for growing where no other person is growing..