Visit your local Garden Centre throughout different seasons of the year and you will be amazed at how many plants will offer interest in the Autumn and Winter as well as the plethera available from Spring onwards. Talk to the staff who should be able to advise you on your requirements.
A gardener's work is never at an end - (John Evelyn 1620-1706)
I think it's better to look at a succession of planting as Obelixx says, and include some evergreen planting for structurein the way S.Surfer shows. Random stands of flowering plants on their own can look a bit odd IMO. You have to look at your own conditions and climate too.
Perhaps aim to have a few areas of the garden designed with that in mind, so that you have an area near the house with scent, for instance, one bed along or beside a path that you use regularly, and one a bit farther away that can be seen from a window or patio door that you look out of often. That could be a specimen shrub/tree for example, with some long flowering perennials below and around it. You can also add some pots to all those areas with bulbs or annuals at the relevant time.
You could pick plants that have been suggested, but link them with others which will give you shape, form and colour when those long flowerers are having a rest.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
@MMflower ...for long blooming roses into winter, we need to look at shrub roses closer to their south Asia/Chinese ancestry.. i.e. Tea and China roses...
'Mme. Antoine Mari'. a 19th Century Tea rose will bloom throughout the period, and is resistant to freezing wind, snow, gales and anything else you can throw at it... add in drought and poor soil, and you've got a winner..
'Bengal Crimson'.. an antique China rose is capable of a full flush in January, in -5C and covered in snow...
For modern Austin roses, look at 'Lady Of Shalott'... it's very tolerant of cold weather and will continue to flower...
..this is 'Bengal Crimson' on 19th Nov... it will keep producing a flush like this on and off through winter if not worse than -5... it may not survive if you get -15C...
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Perhaps aim to have a few areas of the garden designed with that in mind, so that you have an area near the house with scent, for instance, one bed along or beside a path that you use regularly, and one a bit farther away that can be seen from a window or patio door that you look out of often. That could be a specimen shrub/tree for example, with some long flowering perennials below and around it. You can also add some pots to all those areas with bulbs or annuals at the relevant time.
You could pick plants that have been suggested, but link them with others which will give you shape, form and colour when those long flowerers are having a rest.
I live in west central Scotland - not where that photo is...
...for long blooming roses into winter, we need to look at shrub roses closer to their south Asia/Chinese ancestry.. i.e. Tea and China roses...
'Mme. Antoine Mari'. a 19th Century Tea rose will bloom throughout the period, and is resistant to freezing wind, snow, gales and anything else you can throw at it... add in drought and poor soil, and you've got a winner..
'Bengal Crimson'.. an antique China rose is capable of a full flush in January, in -5C and covered in snow...
For modern Austin roses, look at 'Lady Of Shalott'... it's very tolerant of cold weather and will continue to flower...
..this is 'Bengal Crimson' on 19th Nov... it will keep producing a flush like this on and off through winter if not worse than -5... it may not survive if you get -15C...