GardenWizzPlant Care Card

Yarrow

Achillea millefolium · Perennial

Hardiness
H7 Very hardy (to below −20°C)
Position
Full sun, Partial shade
Height × Spread
20–100 cm × —
Soil
Moist but well-drained; Well-drained; Acid, Alkaline, Neutral; free-draining soil
Flowering
March–October
Toxicity
No specific toxicity is listed by the RHS. This is not a guarantee of safety — check with a vet or the ASPCA before pets or children eat any plant.

The Gardening Year

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Sow
🪴 Plant out
🌸 In flower
✂️ Prune

Watch out for

Powdery mildew: Improve air circulation by thinning crowded plants and water at the base to keep foliage dry.

Aphids: Squash infestations by hand or spray with a strong jet of water; introduce ladybirds for biological control.

Slugs and snails: Use beer traps, copper tape barriers, or iron phosphate-based pellets to deter feeding.

Root rot: Ensure well-drained soil and avoid overwatering; lift and divide congested clumps in spring.

Rust: Remove affected leaves immediately and avoid overhead watering to reduce humidity around the plant.

Full guide: gardenwizz.com/plants/yarrow © GardenWizz — UK gardening encyclopedia