Instructions
Attract seven Pinatas of the same species to your garden in order to gain the Horatio Master Romancer award. These seven Pinatas can be baby, juvenile or adult and it doesn't matter how you attract them.
Plant a Gem Tree and wait for it to grow some gems. This indicates that the tree is fully grown, which should attract a Chewnicorn to your garden.
Grow 15 Gems on the tree and feed them to the Chewnicorn to make it happy enough to stay in your garden. Cutting down the tree may drive the Chewnicorn away, so make sure to plan expansions of your garden to include a Gem tree.