Allotments 4 All

This is bizarre.

Last year I planted a two-year-old [vital missing word here - 'campanula'}] which had white flowers. This year the same plant has rich purple flowers. I'm very happy as I much prefer purple to white!

And also a penstemon last year was a pale mauve. This year it's a bizarre pale blue and white.

Can a plant suddenly change like that? I'm very confused!  ???

edit coz i am an idiot!

Aqui, you planting 2 year old children in your garden now?!

whoops - missed the vital word. Will go back and edit it...

They have probably 'reverted' this is quite a common occurence with some 'hybrid' species.