Upon arrival: Unpack box and check that you have everything on your packing list. Bare root Achillea should be dry in storage, so if condensation has formed on the inside of the bag, open and let it air out. Plant everything within a day or two.
Soil/Location: Plant your Achillea in a sunny spot in average to loamy, loose and airy, well-drained soil. Add compost or peat humus to enrich and loosen the soil if needed, but they are very adaptable to almost any soil conditions other than heavy clay or wet areas. Remember to keep the soil light and airy for perennials, so cover them with loose soil and don't pack it in after planting, and if needed build up above heavy soil rather than trying to plant into it.
Moisture: Achillea require little moisture, even after they are actively growing. Early season plantings and plants that have no foliage should be started on the dry side. During that time we like to bury the roots, water lightly once and then we rarely water again, especially not when there isn't any foliage. When actively growing they can be watered a couple times a month if needed, allowing the soil to dry out between watering, however they are quite drought tolerant once established.
Depth: Plant with the top of the crown about 1/2" below soil level. New sprouts will emerge at slightly varying depths and no roots or crown should be showing after planting. Mulch lightly around the plants for weed prevention.
General Instructions: Amend your garden with compost or peat humus to enrich or loosen the soil, if needed, however Achillea are very adaptable to any loose, well-draining soil. Achillea millefolium cultivars may actually be rampant in soil that is too rich, so lean is usually better. Mix a couple teaspoons of garden food or bone meal into the planting hole if desired. Plant the roots as listed above, then water in once lightly. They prefer a slightly dry start when they are dormant in spring and have no foliage. Once they are actively growing it is alright to give them supplemental water once in a while, but they rarely need it and will struggle or flop if the soil is wet.
Landscape Uses: Plant yarrows with other heat and drought tolerant summer blooming plants such as Echinacea, Rudbeckia, Chrysanthemum, Gaillardia, Platycodon, daylilies, lilies, Nepeta, Agastache, and Sedum. Yarrows are a great plant for attracting butterflies plus are excellent for cutting and drying. Pick for drying when they have good color but before they start to turn brown and they will last a long time.