Even if they don't flower this year, they may well overwinter and flower the following spring -- I currently have calendula and rudbeckia plants that hadn't reached the flowering stage by last autumn and survived all winter in their 'juvenile' state. The calendulas are the ones currently in bloom, while the rudbeckia in question has started to put on more growth, and is several months in advance of the ones I am struggling to grow from the seed set by its siblings last year!