In past years i have not had any problems with petunias in hanging baskets on the porch. they receive about 6-8 hours of sun, i water them with a dilute solution of fertilizer and water when the pot is lighter in weight but not dry, One p[ant with about 10 flowers left has little white flecks all over the leaves and flowers. The other plant about 10 feet away has lots of flowers and the white bugs ( not aphids) are just starting to attack it. I am not sure what the insects are or how to get rid of them, Dead petunia plant has been replaced ,