Answer
How do I add colour to my garden?
A succession of planting across the seasons, with foliage and structure between the flowering peaks.
In short
Through planting chosen for a succession of interest across the seasons, so something is always in flower or turning, rather than one big show that then fades. Foliage, bark and structure carry the colour between the flowering peaks. A planting plan is how you get colour that lasts, not just a spring flush.
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