Zone 0 - the house. This is where you spend the most time, so it includes the greenhouse attached to your house and the shade patio/outdoor kitchen.
Zone 1 - the garden right by the house and other things you use daily. This is the garden where you will spend the bulk of your time, and it should be right outside your door so you can pick from it all the time. This zone might also have a tool shed, small pond and some fruit trees depending on how big your property is. Water collection would help facilitate watering the garden.
Zone 2 - this is the area just beyond the perimeter of your kitchen garden. It is where you would keep your compost, and grow staples like potatoes or grains. You would keep chickens or ducks here. In the city this is probably as far as your property would extend.
Zone 3 - this is the area that you don’t have to go quite as often because it’s further away. The gardens here would be perennials, living mulches, windbreaks and firebreaks. You might keep some goats out here, and beehives. If you are growing a cash crop, this is where you would do it. It’s an area that you grow stuff in, but only stuff that uses up lots of space and takes less daily attention.
Zone 4 - this is your rural woodlot, edible forest garden, pig foraging, large pond area. This is where you can develop large tree plantings and long term projects.
Zone 5 - this is the wilderness. Even a small property should have a Zone 5, a small area that you simply allow to return to its natural state. It’s difficult to just not mess with it, but that’s the goal. This area helps you by attracting beneficial insects and allowing wild creatures a safe harbor rather than foraging in your garden.
Some people are a little confused about the difference between Zone 1 and 2. Zone 1 is really the perimeter of your house and only spans the space it takes to throw on some flip flops and meander through in five minutes. It should be as packed with edible plants as possible, and the more your grow here in every spare inch, the more time and effort you will save. This garden should be well mulched between plants and on pathways. Zone 2 is where the stinky stuff goes. On a small lot, you would grow some fruit trees here, possibly a hedge, and some edible shrubs like raspberries. This area would be mulched too, but everything is bigger and more spread out so it takes less attention to detail.