Coreopsis verticillata ‘Grandiflora’ (Threadleaf Coreopsis)

An excellent performer, award-winner Coreopsis verticillata ‘Grandiflora’ (Threadleaf Coreopsis) is a compact perennial forming a gorgeous mound of finely divided leaves. Blooming from early summer to fall, it gets covered with a profusion of large, rich golden-yellow blossoms. Exceptionally vigorous, this perennial tickseed forms airy clumps of fine, threadlike foliage on upright stems that add a lovely delicate texture element to the landscape. Long-lived, this is one of the best and toughest performers suitable for a sunny position in the garden.

• Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society
• Grows up to 24 in. tall (60 cm) and 18 in. wide (45 cm).
• Performs best in full sunin dry to medium moisture, well-drained soils. Tolerates partial shade in hot summer areas. 
• Easy to grow, relatively pest and disease free, this Coreopsis is a favorite of bees and butterflies but is ignored by deer.
• Very versatile, it is a welcomed addition to beds and borders, cottage gardens, wildlife gardens. Effective as an accent plant and spectacular in mass plantings.
• Keep an eye out for slugs, snails or crown rot if grown in poorly drained soils.
• Deadhead regularly to prolong flowering. Midsummer shearing (after the first flush of flowers) should help tidy up the plant and promote a fall rebloom.
• Cut old stems back to their bases as they die back at the end of the year.
• Clumps may be divided every 2-3 years to maintain robustness.
• Propagate by seed at 55-60°F (13-16°C) in late winter or propagate by division in early spring or root basal cuttings in spring.