Perennial flowers have the capability to spring up year after year fuller and healthier than the year before. Grown in dozens of varieties, tall yellow perennial blooms create bright bursts of color in a wide range of shapes, sizes and textures. Nestled as a backdrop among a cottage garden or grown in a cutting garden, tall perennial flowers help to define a space with their erect, commanding stems.
Crystal Cupid Daylily
Crystal cupid (Hemerocallis 'Crystal Cupid') daylilies are summer-blooming perennial flowers with a moderate growth rate and clump-like form. Crystal cupid daylilies grow on tall, upright stems that shoot up 18 inches tall to hold the 6-petaled, bright yellow flowerhead. As the name indicates, crystal cupid daylilies open during the early morning to swirl to a close in evening and only last one day. Drought-tolerant, crystal cupid daylilies are ideal for lining a front flower bed or border. Pest- and disease-resistant, crystal cupid daylilies grow 1 to 3 feet tall, making for a strong, hardy perennial flower. The showy flowers on the crystal cupid daylily attract butterflies to drink from each bloom, creating the quintessential garden experience. Crystal cupid daylilies prefer full sun to part shade and nutrient-laden soil that is well-drained and moist. The USDA Hardiness Zone for planting is 5 to 10.
Hollyhock (Alcea rosea) is a tall perennial flower that grows on upright, erect stems that range from 6 to 10 feet tall and 1 to 3 feet wide. The tall spike holds the large flowerhead that blooms in spring to last through summer. Flowers colors on the hollyhock include yellow, white, red and pink. This flower is ideal for lining a garden fence or backyard patio. Hollyhock flowers have a moderate growth rate. They require full sun and well-drained soil with a dry to medium moisture content. The zone for planting 5 to 9.
Iris spuria (Iris spuria) is one of the tallest varieties of iris and grows in a wide range of colors, including bright yellow. Reaching 3 to 6 feet in height and 6 to 12 inches wide, iris spuria creates a commanding landscape presence. The clump-like growth and moderate growth rate of iris spuria makes for a showy springtime flower. Divide irus spuria in early autumn to use in other areas of the garden. Iris spuria require full sun to partial shade and well-drained, alkaline soil that is nutrient-rich. The zone for planting is 6 to 9.