There is often so much emphasis on flowers that it can be easy to forget that the most important colour in the garden is green. Green is everywhere of course but nonetheless can be overlooked as we delve into the subtleties of different shades of pink or blue. Is the cerise flower of that Geranium too strident, or are the flowers of that Salvia bluey-purple or mauve and will it go with the reddy-pink of the Sedum next to it? Much time is often spent making sure flower colour works, whether in close combinations or in the overall context of a planting scheme, or indeed from one season to the next.

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