Repotting guide

When & how to repot Achillea millefolium 'Cerise Queen' (Achillea millefolium 'Cerise Queen')

Also called Cerise Queen yarrow.

More about achillea millefolium 'cerise queen'

About Achillea millefolium 'Cerise Queen'

Achillea millefolium 'Cerise Queen' · also called Cerise Queen yarrow · flowering

A vivid common-yarrow selection bearing flat heads of cerise-pink flowers with pale centers above ferny, aromatic green foliage all summer. 'Cerise Queen' is tough, drought-tolerant, and pollinator-friendly, spreading readily to fill sunny borders and wildflower plantings. Flowers fade with age, giving a multi-toned look, and dry well for arrangements.

Mature size: About 45-75 cm tall and 45-60 cm wide, spreading wider over time.

How to tell achillea millefolium 'cerise queen' needs repotting

Repotting on a calendar is less reliable than reading the plant. For achillea millefolium 'cerise queen', watch for these signs:

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for achillea millefolium 'cerise queen') flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to repot.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot achillea millefolium 'cerise queen'

Only every 2–4 years, when genuinely crowded. Achillea millefolium 'Cerise Queen' is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. Vigorous, spreading clump-forming herbaceous perennial with ferny green foliage and erect stems bearing flat corymbs of small cerise-pink flowers; can spread by rhizomes..

What size pot to step achillea millefolium 'cerise queen' up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Achillea millefolium 'Cerise Queen' positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping achillea millefolium 'cerise queen' into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot achillea millefolium 'cerise queen'

Early spring, just as new growth restarts, is the ideal window for achillea millefolium 'cerise queen'. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting achillea millefolium 'cerise queen'

Confirm it actually needs it. Slide achillea millefolium 'cerise queen' out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip achillea millefolium 'cerise queen' out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh lean, well-drained soil, tolerating poor and sandy ground, set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water achillea millefolium 'cerise queen' again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for achillea millefolium 'cerise queen'

Achillea millefolium 'Cerise Queen' wants lean, well-drained soil, tolerating poor and sandy ground. Best in poor to average free-draining soil with neutral to slightly alkaline pH. Rich, moist soil causes floppy growth and more aggressive spreading; sharp drainage matters most. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting achillea millefolium 'cerise queen' — frequently asked questions

How often should you repot achillea millefolium 'cerise queen'?

Only every 2–4 years, when genuinely crowded for achillea millefolium 'cerise queen'. Only repot achillea millefolium 'cerise queen' every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using lean, well-drained soil, tolerating poor and sandy ground. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does achillea millefolium 'cerise queen' need?

When is the best time of year to repot achillea millefolium 'cerise queen'?

Does achillea millefolium 'cerise queen' like to be root-bound?

Yes — achillea millefolium 'cerise queen' genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise achillea millefolium 'cerise queen' after repotting?

Not immediately. Wait about 4 weeks after repotting achillea millefolium 'cerise queen'. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.