Imagine a garden that contained one of every plant species known to mankind. Every tree, every shrub, every groundcover, every bulb, conifer, palm, and weed. You name it - it was there.

Now think how much room it take to hold that number of plants in one place (if it were at all possible). Would it be a National Park size? Possibly a small island? Or, maybe an average size country?

Sure. If you just threw all the plants together it wouldn't require a huge location but if you planted them with their prefered habitats ie. full-sun, part-shade, below a tropical canopy etc this area is going to be of mammoth proportions.

Plus, all the trees would need room to mature and spread so they could grow as healthy as possible. The swamp and bog plants must be kept separate from the cacti and the alpine species are going to struggle in the same spot as most Mediterranean plants.

What do you think? Is it a small continent or can they all be contained within a large farm?