Ageratum Flower Spacing. It grows 2-3 tall and is covered in fuzzy blue flowers from September to October. Timeless Mix Ageratum Planting Method.
6 Bed Feet Needed. One of the larger varieties Blue Horizon will grow to 24 in height in bed spaces. They will tolerate a fair amount of shade.
As they become established ageratums need to be kept moist.
More than 60 cultivars of the blue ageratum flower are available often reaching only 6 to 8 inches 15-20 cm when fully grown. They are tolerant dry soil conditions. 14052020 May 14 2020. For nursery starts remove plant from the container and gently tease out the roots if potbound.