Tends to sprawl, particularly if grown in moist and/or fertile soils. Check these Great Plant Combination Ideas with Coreopsis, A Casual Border with Poppies, Tickseed and Mullein, A Prairie Planting Idea with Easy Care Annuals and Perennials, A Spectacular Summer Planting Idea with Dahlia, Zinnia, Chinese Aster and Ammi visnaga, A Great Summer Planting Idea with Mexican Sunflowers, Zinnia and Grasses, A Terrific Duo to Try: Achillea and Festuca, A Cheerful Border Idea with Monarda, Clematis and Artemisia, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, H1, H2, Deer, Drought, Rabbit, Dry Soil, Rocky Soil, Coreopsis grandiflora (Large Flower Tickseed). Spectacular in mass plantings. White fungal growth webs at the base of the dying plant and become peppered with small, tan, round structures. Also effective in naturalized areas, meadows, prairies or cottage gardens. The most common which may arise in some varieties is sprawl, poor bloom, die back, crown rot and pest infestation. Crown, Stem and Root Rot The Sclerotium rolfsii fungus causes crown rot in coreopsis plantings. Attractive to butterflies but ignored by deer! This plant actually thrives in average soil that’s not nutrient- or organically-rich. Poor drainage can cause crown and root rot. Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. Keep an eye out for powdery mildew, leaf spot and rust. It is hardy to zone 5. White fungal webbing forms around the base of the plant, and the leaves and blossoms turn brown as they wilt and die. tall (45-75 cm) and 12-18 in. Consistently damp weather may cause a variety of problems for this plant, including slug or snail damage and fungal spots in addition to powdery mildew. Borders. Coreopsis can suffer from crown rot (Sclerotium fungus), root rot (Rhizoctonia fungus) and stem rot (Alternaria, Rhizoctonia or Sclerotinia fungi). Mature plants may be increased by division in the spring or fall. Tolerant of heat, humidity and drought, Large Flower Tickseed is a real workhorse in hot and often dry summer gardens. Crown rot may occur if grown in moist, poorly drained soils. across (5-7 cm), from late spring to late summer - if spent flowers are deadheaded. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas. Coreopsis is ignored by deer; Very versatile, it is a welcomed addition to cottage gardens, rock gardens, naturalized areas, prairies and meadows. Easily grown from seed. Large Flower Tickseed is an excellent pollinator plant, attracting bees, butterflies and other pollinating insects. Accept Not sure which Coreopsis to pick?Compare All Coreopsis, Buy Coreopsis grandiflora (Large Flower Tickseed), Great Plant Combination Ideas with Coreopsis. Coreopsis usually has few serious insect or disease problems. Native to central and eastern North America. SUMMARY . Common problems with the coreopsis plant and troubleshooting. These wiry stems sway gently in the slightest breeze and create sunny movement in the landscape. Crown rot may occur in poorly drained soils. No serious pest or disease issues. Provide consistent fertilization for optimum flowering and growth. If allowed to go to seed, blooming will stop and the plant will tend to decline. The Sclerotium rolfsii fungus causes crown rot in coreopsis plantings. Cut back hard in summer if foliage sprawls or becomes unkempt. Mulch in a manner that does not hold moisture close to the stems. Plants in the genus Coreopsis are sometimes commonly called tickseed in reference to the resemblance of the seeds to ticks. 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