threadleaf coreopsis

Water the threadleaf coreopsis (Coreopsis verticillata 'Zagreb') deeply and infrequently. Soak the plant thoroughly once a week, allowing the soil to dry out in between waterings to prevent rootrot. In hot, dry summers, increase watering to every 4 to 5 days to keep the plant looking healthy and drought-tolerant. Adding a 2 to 3-inch layer of mulch can significantly reduce evaporation and keep the soil moist for longer periods, cutting down on waterings. Additionally, monitor this plant throughout the growing season to ensure consistent moisture in the soil.

Threadleaf coreopsis (Coreopsis verticillata 'Zagreb') is a perennial plant that prefers full sun to light shade. It will perform best when it receives at least 6-8 hours of direct sunlight every day. Plant it in an unobstructed location that will receive plenty of sun throughout the day, avoiding hot, midday sun. In hot summer areas, afternoon shade may be beneficial for the plant. While this species of plant prefers full sun, it can tolerate some light shade and find some partial relief from harsh sun in its afternoon landscape.

Threadleaf coreopsis (Coreopsis verticillata 'Zagreb') should be pruned once a year in late winter or early spring. Prune any dead or damaged branches and cut back the foliage to the desired size or shape. Trim the foliage back to the green, living portion of the stems, leaving the longest stems at least 3–4 inches long. Pruning in late winter or early spring will encourage increased branching and provide for a fuller, more compact shape. The shorter stems of threadleaf coreopsis will also create a fuller, more compact shape.