There is a random element to certain aspects of the game, so that no two games will ever be exactly the same. The Fabled Lemonbush is a Tier 2 plant with a Tier 3 flower, so it technically cannot "thrive" in the Bio-organic soil and will require Soil from Isola to truly do well. How hardy a given plant will be in soil that is not adequate for its growth may vary from game to game.