I'm in favour of shrubs that simply go about their business with minimal attention from me, apart from the occasional watering if there hasn't been rain for a month or so. I'm even more fond of shrubs that live quietly in my garden for most of the year until the day they cover themselves with glorious blooms. That's why I love my brunfelsia.
You can see why this is also called 'yesterday, today and tomorrow'; the flowers bloom in a strong purple colour, then fade through lilac to white. Simply gorgeous.
My shrub is covered in flowers that contrast beautifully against the deep green foliage. Low maintenance and beautiful - what more can you want from a shrub?
(Note, all parts of brunfelsia are poisonous to dogs so take care if you have pets.)