Bring long-lasting summer color to your garden with Coreopsis verticillata 'Designer Threads™ 'Heartstrings' (Threadleaf Coreopsis 'Designer Threads™ 'Heartstrings'). You get a neat, mounded perennial with airy, threadleaf foliage that reads light and refined even when it is not in flower.
Plant it where you can enjoy its cheerful display through the warm months. In the landscape it works beautifully as a sunny border plant, in small groups, or in naturalized areas. It also fits well in pollinator-focused plantings where you want steady bloom without constant fuss.
Give it well-drained soil and a spot in full sun for the strongest habit and best flowering. Once established, it handles dry conditions well and is a good choice for lean, sandy, or rocky soils. If your soil is rich and stays moist, growth may get looser, so focus on drainage and avoid overwatering.
At maturity, expect a compact, easy-to-place plant around 18-20 inches tall with a spread of about 22-24 inches. The fine texture makes a great contrast with broader-leaved perennials and ornamental grasses, while the bright blooms keep the planting looking lively.
Maintenance is simple: water regularly the first season, then as needed during prolonged dry spells. You can tidy it up by shearing lightly after a flush of bloom to encourage fresh growth and potential rebloom later, and cut stems back in early spring before new growth emerges.