Flowers are not immune from disease, and you should be prepared to take action to help your flowers if they fall prey to one of these diseases. Flowers can be attacked by all sorts of things, like bacteria, viruses, and fungi.
Fungi can live dormant in the soil, even without plants, for quite a long time. Even if you grow your flowers in an area that's been bare for a long time, fungi can still be there, waiting for you to plant something that it can attack. So don't think starting wi