One of the tallest Yarrows, award-winner Achillea filipendulina 'Gold Plate' (Fern-Leaf Yarrow) is a showy herbaceous perennial boasting a profusion of impressive, mustard-yellow, long-lasting clusters, up to 6 in. wide (15 cm), from early to late summer. Sitting atop erect leafy stems, the blossoms float above the elegant, semi-evergreen, gray-green fern-like leaves. The foliage emits a spicy aroma when crushed. Easy care, drought, heat, humidity, and deer tolerant, this towering beauty is…