“Petunia is a genus of 35 species of flowering plants of South American origin, closely related to tobacco, cape gooseberries, tomatoes, deadly nightshades, potatoes and chili peppers; in the family Solanaceae." (Wikipedia)
Name: Glen Ingram Macleay Is, Qld, Australia (Zone 12a) (Lee Reinke X Rose F Kennedy) X Unk
Margaret, I cannot remember what colour the parents were last year. My feeling is the variety in colour is less and the flowerers aren't as big with progeny. I remember a bright red one and a pink one in the spot of the photos.
These are some of the self seeded ones. You can see that mobs have germinate. There is a nice purple offspring too but 'battery exhausted' happened on me.
The problem is that when you are young your life it is ruined by your parents. When you are older it is ruined by your children.
Name: Margaret Near Kamloops, BC, Canada (Zone 3a)
Glen, yes I can see that they are smaller blooms, which are pretty, but if you want the larger showy blooms then I would suggest replacing rather then letting them go to seed, or buy new seeds and sow those where you want them to grow.