Rainbow Ending Blue Yarrow (Achillea millefolium 'Rainbow Ending Blue')
ah-KILL-lee-ah mil-lih-FOE-lee-um 'Rainbow Ending Blue'

Deciduous Perennial Upright, Spreading in the Asteraceae Family
Pink turning blue as flowers end their bloom.

'Rainbow Ending Blue' is a trade-named selection of common yarrow (Achillea millefolium) distributed internationally as a bare-root perennial, primarily through Dutch wholesale suppliers such as De Vroomen, alongside UK and European garden retailers. No individual breeder or US plant patent was found for this name — it appears to be marketed as a proprietary trade name rather than a patented cultivar.

Its defining trait is a flower head that opens pink and gradually shifts to blue as it ages, so a mature plant typically shows both colors at once across its many small flower clusters. Like other common yarrow forms, it has finely divided, aromatic, grey-green foliage and blooms over a long stretch from early summer into fall.

Pros

  • Distinctive pink-to-blue color-shifting flower heads over a long bloom season
  • Deer- and drought-resistant once established
  • Aromatic, fern-like foliage stays tidy all season
  • Good as a fresh or dried cut flower

Cons

  • Flower color described inconsistently across sources — some report a blue-to-lavender fade instead
  • No confirmed patent or named breeder found
  • Prone to flopping in overly rich or wet soil
Highlights Flower heads open pink and age to blue, so a single plant shows both colors at once across a bloom cluster — a distinctive effect among yarrows, most of which hold one color start to finish.
 

Plant Data

Mature Size 16 - 24 inches tall. 24 - 36 inches wide.
Growth Rate Fast
Sun Exposure Partial Shade - Full Sun
Moisture Tolerance Dry - Medium: Drought-tolerant once established; prefers dry to average moisture and does not tolerate consistently wet soil.
Zones 3a - 8b (Usually hardy to -40° F)
Tags Attracts Bees, Attracts Butterflies, Attracts Pollinators, Deciduous, Deer Resistant, Dry, Fast Growth Rate, Full Sun, Good for Butterfly Garden, Good for Cottage Garden, Good for Mass Planting, Medium, Partial Shade, Partial Sun, Perennial, Semievergreen, Tolerant of Acidic Soil, Tolerant of Poor Soil, Well-Drained Soil
Bloom Period June to September
Flower Color Pink, Aging to Blue
Foliage Color Grey-Green
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Pricing and Availability History

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Past Availability
2024 : 09/05 - 09/08

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Field-Grown vs. Greenhouse-Grown Plants

Plants which are well-adapted to our local climate are most often field-grown (outside). Field-grown plants are generally cheaper and have the advantage of already somewhat acclimated to our cold winters, but that means they’re not artificially far along in the spring and tend to bloom at the normal time in our area.

Spring annuals and tender perennials are typically grown in Greenhouses so they can be ready and luxurious exactly when customers want them. Some perennials are also “forced” into early bloom in greenhouses. In May, there can be a very big difference between field-grown and greenhouse-grown plants of the same type. The latter typically look good right away (so they’re a great choice where that’s important), but we typically pay a premium for it.


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No Pricing or Availability Right Now

We order from a rotating cast of the best nurseries in the Great Lakes region. It looks like we've offered this plant in the past, but the nurseries we're working with this week don't appear to have it in stock at the moment.

Our goal is to bring as many plants together under "one roof" as possible, so we'll try hard to make it available again in the future!