The Plants Spawn At Random On The Peninsula, So You May Have To Run Around A Bit.
The Plant Types You Need For This Are As Follows:
-Aloe Vera plant
-Coneflower plant
-Blueberry bush
You Will Need A "Berry Pouch" (Two Rabbit Skins To Craft) To Be Able To Find Blueberry Seeds.
Build A Garden Plot And Plant The Three Types Of Seeds And The Achievement Is Yours!
Good Luck!