I grew a trailing double-petalled white petunia in a window box which
was verysuccessful last season. I went onto my balcony ready to throw
away all the old annuals when noticed that on the Petunia new buds have
broken with fresh leaves just emerging. I've pruned the plant back quite
hard, with sevral old stems left with live buds.

Will this plant be expected to flourish for a second year?