Achillea × 'Firefly Red Pop' is a bold, easy-care yarrow that adds hot color and fine texture to beds and borders. You will get upright stems topped with flat clusters of bright cherry-red flowers accented by small yellow eyes, held above silvery green, finely cut foliage. This cultivar typically reaches about 24-28 inches tall and can spread to roughly 24-28 inches wide, forming a neat, clumping perennial with a strong summer presence.
For best performance, plant it where it receives full sun and where soil drains well. Yarrow generally does not like consistently wet or overly rich soil; average to lean, well-drained ground helps keep stems sturdy. Water to establish, then let the soil dry slightly between irrigations. Once established, it handles dry spells well and is a good choice for water-wise gardens and hot, sunny spots.
To keep flowering tidy and encourage fresh growth, shear or cut back spent flower stems. You can also trim the plant back after the main flush to refresh the foliage and maintain a compact habit. Give it airflow, avoid over-fertilizing, and space plants so clumps can expand to their mature width. In winter, leave stems for structure if you like, then cut back in early spring as new growth begins.