Water Noble Yarrow thoroughly when the top 2-3 cm of soil feels dry. It prefers well-drained soil and is drought-tolerant once established. Avoid overwatering, as this can lead to root rot.

Reduce watering in cooler months when the plant is less active.

Deadhead spent flower stalks to encourage continuous blooming and maintain a tidy appearance. In late autumn or early spring, cut back the entire plant to about 10-15 cm above the ground to promote new growth.

Remove any dead or damaged foliage throughout the season.

Noble Yarrow is easily propagated by division in early spring or autumn. Carefully dig up the plant and separate the root ball into sections, ensuring each section has roots and shoots.

Replant divisions immediately into well-drained soil. Stem cuttings can also be taken in late spring or early summer.

Repotting is generally not required for Achillea nobilis, as it prefers to be slightly root-bound and can become invasive if given too much space.

If division is done for propagation or to manage size, replant into similar soil conditions. Focus on dividing overcrowded clumps rather than traditional repotting.