'Zagreb' is a threadleaf coreopsis cultivar with more compact foliage, and deeper yellow golden flowers that bloom most all summer. Grows about 12 to 15 inches tall and wide. Ideal for sunny, hot perennial borders, parkstrips, walkways.
Grow in well-drained, slightly loamy to sandy-loam soils in full sun. Plants tolerate drier conditions than do the grandifloras. This coreopsis doesn't require deadheading to maintain bloom. however, during the peak of the summer heat, flowering may slow. shearing aback the plants a bit will encourage new foliage and usually another good bloom. Otherwise, it may bloom until frost, though the flowering will be less profuse. In optimum growing conditions, plants will spread in the garden over time by stolons to form an attractive ground cover, but spread is easy to check.