Balcony composter
If you have any outside space, many municipalities offer apartment-sized composter units - about the size of a rough tote. In Vancouver, a composter, some worms, and an orientation session cost $25. A small balcony is enough space, but even outside the building in a secluded area of garden would work (the worms will go walkies on occasion - inside seems harder). Then just add some dry leaves or shredded newspaper, start adding compost, and you quickly have rich soil for your plants.