Ann, beautiful picture. Petunias are very beautiful and lovely flowers for sure. You are lucky to have a wonderful neighbour, such as you have. The ability of plants to reseed still blows my mind. ONe year I planted a burgundy coloured petunia as part of the colours I offered to my customers. I never planted burgundy petunias in my gardens, I find that petunias are plain and simply way too much work, with the deadheading that is required for them to look fresh. I am too lazy in that regard, I go for easy care annuals. Funny thing that.
Anyways, last year a burgundy petunia popped up down beside where we park our cars. So....that would mean that this seed, from wherever it came, had gone dormant for about 5 years before the time was perfectly right for it to germinate. I know it came from my greenhouse so many years ago. But that is amazing, eh? Have a wonderful day, great life. Cindi