never use carniverous animal dung as fertalizer, it's poison, pigs can kill fish for several miles downstream if a large number of them frequently deficate near it. same goes for ours, dogs, and cats. composted leaves work well, but as long as your soil is nice and black, and fluffy not to full of clay(dries to hard for roots to grow.) you should be fine, if it shown deficencys still fertalizer is pretty cheep, i recomend osmocote 14-14-14 time realease fert. they sell it at every store with a garden section and works great.