This yarrow is native to the Channel Islands off of the California Coast, but is hardy to USDA Zone 5. The color is variable, from white to pink and even bright red (it comes down to seed source and soil). Foliage is green to green-gray, fern-like, and aromatic. Grows about 16 to 24 inches tall and wide.
Many different cultivars of Yarrow are available, with different flower colors, including yellows, reds, peaches, and pinks. Yarrow makes a good ground cover when mowed, and tolerates a fair amount of foot traffic. Divide in the spring every few years as the centers can sometimes melt out. Grow in full sun to part shade in well drained soils. Tolerates clay soils. Yarrows are best not planted next to slower-growing and smaller perennials, as they may overtake and overwhelm them.