See Post #65 for my explanation of why I pinch off young blooms on tomatoes and peppers, and advised Ern to do so, too.
But you are right on the other dead-heading you talked about. Isn't it nice that they've breed a number of Petunia now that are very quick about shedding their spent blooms? I am growing three hanging baskets of 'Wave' Petunia this season and I LOVE them!
I always thought Petunia were for Old Ladies - but now I are one, LOL! ;) Not cheap, though! $9 for a 6-pack, but they really are beautiful.
Those are gorgeous! I grew Evening Scentsation petunias from seed and they are very impressive in growth habit (sturdy not long ) and flower production (huge). Will keep growing them every year. The scent really is amazing, as advertised by the seed company.