long lasting flowers

like I said, all info needs to be double checked ... on the web, some sites gives the exact months, and others will say 'summer' ... so it depends on which site you get the info ... example:
Perennials.com :: Plant Details (Sidalcea ‘Brilliant&rsquo

and here is another site that says it flowers from June to august:
http://www.rhsplants.co.uk/plants/_/perennials/sidalcea-brilliant/itemno.RH30000342/


obviously, your info will be more correct, as you have 1st hand experience of actually growing it in your own garden

 

Surprisingly, Calibrachoa million bells, flower exceptionally long, even past the first frost, not just that but it is actually a perennial under -5C.. who'd have thought it, it's so exotic looking!

Gazanias always do well, also Snapdragons, mine flowered en mass from April (and still are doing now)

Abutilon megaptomicum - still flowering now.

 

Mimulus cardinalis will bloom pretty much all summer if kept moist..........

Mimulus Cardinalis by longk48, on Flickr

On Dims list is Beserra elegans. Sadly this doesn't bloom for a long period but deffo deserves to be grown!