Achillea millefolium

Yarrow Care & Identification Guide

Yarrow (Achillea millefolium) is a legendary, rugged perennial herb deeply embedded in ancient mythology—reputed to have been used by Achilles to stanch the bleeding of his soldiers. A fierce, drought-tolerant survivor, it thrives in poor, rocky soil and intense sun, spreading rapidly via rhizomes. With its soft, incredibly finely cut, fern-like foliage and broad, flat-topped clusters of tightly packed flowers, it is an indispensable, low-maintenance staple for pollinator gardens and naturalized dryland meadows.

Sunlight Full Sun to Partial Shade

Watering Low (extremely water-efficient)

Soil Mix Average loose sandy potting loam

Temperature 15°C - 25°C

Toxicity Non-toxic to pets (robust wild defenses)

Botanical macro photography of Yarrow (Achillea millefolium) - Plant AI care database

How to Identify Yarrow

Yarrow (Achillea millefolium) is a remarkable botanical species widely appreciated for its unique aesthetic and structural appeal. Recognizing its definitive visual traits is key to distinguishing it from other similar plants.

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Key Visual Features: Upright, stiff, slightly hairy stems bearing incredibly finely divided, lacy, feathery, fern-like leaves (giving rise to the name "millefolium" or thousand leaves). Produces dense, flat-topped terminal clusters (corymbs) of tiny, tightly packed, five-petaled flowers.
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Color Variations: Dark green to grayish-green, feathery foliage. Wild yarrow produces pure white flowers, but modern ornamental cultivars come in brilliant shades of yellow, red, pink, and orange.
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Common Confusions: Often confused with Queen Anne's Lace or highly toxic poison hemlock (which are much taller and have different floral structures) or tansy (which has yellow, petalless button flowers). Yarrow's ultra-fine, feathery leaves and spicy, pine-like aroma set it apart.

💡 Plant AI Tip: Not sure? Take a photo with Plant AI to identify your houseplants instantly.

Complete Care & Cultivation Guide

Follow our detailed scientific care guide to keep your Yarrow thriving and gorgeous all year round.

Extremely resilient and water-efficient once established. Water deeply only when the top 3 inches of soil feel completely dry. Potted wild herbs easily survive periods of dry neglect but suffer in stagnant, soggy containers.

Minimal grooming required. Cut back old, withered, or damaged foliage at the base to encourage fresh growth. Wipe broad linear leaves with a damp cloth to clear indoor dust and maintain waxy photosynthetic health.

Requires almost no fertilizer. These wild species are adapted to poor soils and grow vigorously without supplemental feeding. A thin layer of organic compost applied in spring is more than sufficient.

Thrives in full sun to partial shade, needing at least 5 hours of light daily. Highly adaptable, making them excellent choices for indoor window ledges with variable solar exposure.

Highly adaptable to poor soils, but prefers a loose, sandy loam. Use a potting mix of 50% average potting soil, 30% perlite, and 20% coarse sand, with a neutral pH of 6.0 to 7.5.

Propagate easily via seeds sown in spring or by dividing mature root crowns. These wild plants are exceptionally robust and adapt quickly to transplanting.

Extremely cold-hardy and winter-resilient. Leave potted foliage intact during winter to protect the crown, and ensure the soil does not freeze solid in small pots.

Choose sturdy clay pots with bottom drainage holes. Repot every 2 to 3 years when roots completely crowd the pot to provide fresh soil nutrients.

Highly pest-resistant due to natural wild defenses. May host aphids if stressed; a strong blast of water or insecticidal soap spray easily clears minor pests.

Strongly disease-resistant, but can suffer from rust or root rot in waterlogged potting mixes. Empty the drainage trays and place in well-ventilated rooms.

Potted wild herbs bring an organic, natural wildflower meadow aesthetic to your windowsill. Harvest the tender young spring leaves for high-nutrient salads or medicinal preparations.

Common Diseases & Treatment

Root Rot (Overwatering)

Symptoms: Leaves turn soft and yellow at the base, shrivel and drop prematurely, accompanied by a mushy root system and foul soil odor.

Action: Drastically cut watering. Remove mushy leaves, wash away old soggy soil, prune rotten black roots, and repot in dry succulent mix with drainage holes.

Foliage Rust

Symptoms: Small powdery orange or brown pustules appear on the linear leaves under humid, poorly ventilated indoor conditions.

Action: Isolate the plant, prune infected leaves, and spray with a copper-based organic fungicide. Improve indoor ventilation.

Frequently Asked Questions

Q: Will Yarrow take over my garden?

A: Yes, it can be highly aggressive. It spreads rapidly via creeping underground rhizomes and prolific self-seeding. To control it, divide the clumps every few years and rigorously deadhead the fading flowers before they drop seed.

Q: Why is my Yarrow flopping over?

A: Yarrow thrives on neglect. If planted in rich, heavily fertilized garden soil, or if it doesn't receive full, blazing sun, it will grow weak, leggy, and flop completely onto the ground.

Q: How do I harvest Yarrow for medicinal use?

A: Harvest the aerial parts (the leaves and the flat flower heads) in mid-summer when the plant is in full bloom and the volatile oils are at their absolute peak. Hang them upside down in a dark place to dry.

Q: Does Yarrow require a lot of water?

A: No, it is exceptionally drought-tolerant once established. It prefers dry, poor, well-draining soil and will suffer from root rot or powdery mildew if kept constantly wet.