About Must Have Perennials: “Must Have Perennial varieties are tested at the famous Bressingham Gardens, as well as other secure trial sites worldwide.”

For more information: ckelleher@musthaveperennials.com


Achillea millifolium ‘Ritzy Rose’

Common name: Yarrow

Trademark: ‘Ritzy Rose’ USPPAF

Introduced by: In Rozanne and Friends™ brand from Must Have Perennials™

  • USDA hardiness zone: USDA Zones 4 to 8; heat zones 9 to 1
  • Ornamental features: Deep rose blooms mature to pink with a lighter eye; blooming earlier than other Achillea varieties; repeat blooming atop a well-branched and mounding habit
  • Habit and growth rate: Compact, mounding; 10 to 14” tall by 10 to 14” wide
  • Culture: Full sun; porous soil/good drainage; should not remain wet or be allowed to wilt down
  • Pest/disease problems/unique resistance: For genus, aphids and spider mites; for genus, Botrytis
  • Availability: Liners

Stokesia laevis ‘Blue Frills’

Common name: Stoke’s aster

Trademark: ‘Blue Frills’ USPPAF

Introduced by: In Rozanne and Friends™ brand from Must Have Perennials™

  • USDA hardiness zone: USDA Zones 5 to 9; heat zones 9 to 5
  • Ornamental features: Loads of large, 2.5 to 3-inch free-flowering, electric blue blooms; improved habit and flowering performance over Stokesia ‘Peachie’s Pick’; blooms sit atop plants
  • Habit and growth rate: Vase-shaped habit; 16 to 18” tall by 20” wide
  • Culture: Sun; use porous soil and good drainage; should not remain wet or be allowed to wilt down; pinching not required
  • Pest/disease problems/unique resistance: For genus, common pests are aphids and thrips; common disease is Botrytis
  • Availability: Liners