Pests or Diseases: Deer Resistant and Resistant to Walnut Toxicity. Powdery mildew and stem rot are occasional problems in humid conditions.
Planting Instructions: Dig a hole large enough to encompass the roots without bending or circling. Set the plant in place so the crown (part of the plant where the root meets the stem) is about 1-2 inches below the soil surface. Cover with soil to the original soil surface and water thoroughly. Best grown in lean, dry to medium wet, well-drained sandy loams in full sun. Does well in average garden soils and tolerates poor soils as long as drainage is good. Avoid heavy clays and moist, rich, fertile soils. Tolerates hot, humid summers and drought. Best sited in locations protected from strong winds. Plants tend to sprawl, particularly in hot, humid climates if grown in moist, rich soils. Cut plants back after flowering to tidy the planting and to encourage new foliage growth and additional bloom. Plants may be sheared to basal foliage after bloom. Divide clumps as needed (every 2-3 years) to maintain the vitality of the planting. Plants slowly spread by rhizomes and can naturalize into substantial colonies over time.