Fertilizer is the magic ingredient of amazing flower and vegetable garden growth. Plants need food just like we need certain kinds of food to stay healthy. So just as we need vitamins and minerals to enable the body to grow and work, flowers and vegetables need certain essential nutrients.
You can make the best plant food from things you already have – things you might otherwise just throw out. Of course to do that, you need a proper compost bin to collect it and get it to produce the right combination of usable nutrients for plants.