I’m the gardener in our household, though I’m more experienced with fruit and veg than flowers. As such I’ve been the one to plant up our garden, and have followed my own tastes, which are for a relaxed cottage garden with lots of scented flowers in pinks, whites and lilacs, as well as lots of edibles.
My partner likes flowers with a rich purple colour. He picked out a Senetti pericallis violet bicolour at the garden centre last year, and was very disappointed to find out it’s an annual in our climate and hasn’t returned this year 
Please could you recommend your favourite purple flowers that come back every year? He likes strong colours, not lavender or heathers etc.