Summer Pastels™ Yarrow

Summer Pastels is a seed-grown yarrow group that produces flattened flower clusters in a mixture of white, pink, yellow, orange and red above divided, greyish-green foliage. Plants grow from seed, so flower shades vary within the group rather than matching one vegetative clone; the upright stems form clumps about 30–60 cm tall ([RHS profile](https://www.rhs.org.uk/plants/80070/achillea-summer-pastels-group/details)). ## Landscape Use Plant Summer Pastels in full sun and well-drained soil. The RHS recommends it for flower borders, gravel gardens and cutting, while Ball Seed lists it for butterfly gardens and fresh or dried arrangements. Published sizes vary: Ball Seed gives 18–24 inches in height and 18–36 inches in width, while RHS lists broader mature ranges, so allow space for the clump to develop ([RHS profile](https://www.rhs.org.uk/plants/80070/achillea-summer-pastels-group/details), [Ball Seed profile](https://info.ballseed.com/WEBTRACKPLANTINFO.ASPX?PHID=000400928003468&env=P)). ## Seasonal Interest Ball Seed lists summer and late-summer flowering. The RHS notes that deadheading may encourage repeat flowers during summer ([Ball Seed profile](https://info.ballseed.com/WEBTRACKPLANTINFO.ASPX?PHID=000400928003468&env=P), [RHS profile](https://www.rhs.org.uk/plants/80070/achillea-summer-pastels-group/details)). ## Maintenance Water new plants during dry weather while roots establish; established yarrow tolerates dry spells ([RHS guide](https://www.rhs.org.uk/plants/achillea)). Cut back untidy foliage in spring; remove faded flower heads if you want to encourage repeat summer bloom. The RHS identifies this as a seed-propagated group, so raising new plants from seed is appropriate ([RHS profile](https://www.rhs.org.uk/plants/80070/achillea-summer-pastels-group/details)).