How to Grow White Yarrow From Seed

White yarrow is a tough perennial, so you plant it once and enjoy it for years. Sow directly in early spring once the soil can be worked, or in fall, or start seeds indoors 6 to 8 weeks before your last frost for the earliest flowers. An early indoor start often gives a light first-year bloom, with fuller displays every year after. Yarrow is hardy across most of the country (roughly USDA zones 3 to 9), so both spring and fall sowing work well from the Northeast to the Mountain West.

Yarrow seeds are tiny and need light, so press them onto the surface of moist soil or seed mix and do not cover them. Keep the surface lightly moist at about 65 to 75F and seedlings appear in 10 to 21 days. Thin or transplant to 12 to 18 inches apart in full sun and sandy, well-drained soil. Yarrow actually prefers lean ground, so skip the rich compost and heavy feeding, which only make the stems flop.

Once established, yarrow nearly takes care of itself. Water young plants to build deep roots, then let it fend for itself; it is genuinely drought-tolerant and rots in soggy ground. Deadhead spent flower clusters to tidy the plant and encourage more blooms, and cut it back to the low leaves after flowering for fresh growth. Every 3 to 4 years, dig and divide the clump in spring or fall to keep it vigorous and stop it spreading too far. Its ferny foliage is also aromatic, which helps keep deer and rabbits browsing elsewhere.

Yarrow is a workhorse of the pollinator garden, and its flat flower heads bring in ladybugs, hoverflies, and parasitic wasps that hunt aphids across the whole bed. It pairs naturally with other sun-loving, low-water bloomers. These four make great companions, and you can add any of them in one click:

For cut flowers, snip whole stems in the morning once the flower clusters are fully open but still fresh and firm. To dry them for lasting arrangements, bundle a few stems, tie the ends, and hang them upside down in a warm, dark, airy place; yarrow holds its shape and color well. To save seed, let some heads mature and darken, then collect and rub out the tiny seeds and store them cool and dark.

White yarrow is one of the most useful plants you can add for wildlife. Its broad, flat flower heads are landing pads for butterflies, bees, and beneficial insects, making it a cornerstone of any pollinator or meadow planting. The long-lasting blooms are excellent as fresh cut flowers and dry beautifully for everlasting arrangements and wreaths, and the aromatic, ferny foliage helps deter deer and rabbits.

• Flopping stems: too rich a soil, too much water, or shade. Grow in full sun and lean soil, go easy on feeding, and cut back after the first bloom.
• Spreading too fast: divide the clump every 3 to 4 years and deadhead before seeds scatter.
• Poor germination: the seeds need light, so surface-sow and never bury them, and keep the surface evenly moist.
• Powdery mildew in humid spells: improve airflow by thinning and dividing, and water at the base rather than overhead.