
Border Perennils?????? But that would mean winter wont have colour!!!!!!
Blooming all year round is a hard one even for the professionals!!!!!
How big a borders are they??????? As the easiest option is shrubs at the back, that can be evergreen and blooming or just evergreen, things like Ceanothus blue mound (Dark green small leaves with Blue flowers from about now onwards)
Photinia (evergreen large green leaves but new leaves come out RED)
Osmanthus another small leaved plane with small insignificant flowers but highly fragranced.
Depends on soil but you may have the options of Azaleas and rhodys!!!!
The border perennials in the middles can have alot of vareid lovely flowers :) Things like Michalmus daisy, etc
Then small ground coverat the front, aubritia for coulour this time of the year.
Bulbs can be planted in amongst the ground cover and border perennials!!!!
Books that are our bibles when we dont know something are the Hessyon series, ie Tree and shrub expert, flowering shrub expert, flower expert etc etc etc
Gives you good ideas.
But forst you need to know is you soil acid or alcaline??????????? Easy way to find out if you dont know LOL
Sorry not much help but a start :)
Lea :)