Black Adder Phormium

Phormium cookianum Black Adder PP20451 Home » The Collection » Black Adder This evergreen perennial holds its dramatic dark burgundy foliage and its size. Great in mixed borders, containers, and can even be planted as a hedge. Leaves provide structure in flower arrangements. Protect from frost in colder climates.
Black Adder Phormium
Black Adder Phormium Container Black Adder Phormium Closeup Black Adder Phormium Container
Feature Dramatic dark foliage year-round
USDA Zones Hardy to 15° USDA Zones 8B-11
Sunset Zones 4-7 (with protection) 8-9,14-24
Special Features Dwarf Habit, Easy Care, Salt Tolerance, Water-wise
Landscape Use Border, Container, Cut Flowers/Foliage, Firescaping/Fire Wise, Slope
Exposure Full sun to part shade
Flowering Season
Dimensions 3-4' H x 3' W
Growth Rate Fast
Plant Type Evergreen
Water Needs Low Water Once Established/Water-wise
Soil Well-drained soils
Fertilizer Apply a balanced slow-release each spring
Pruning Cut damaged foliage at base

Planting Instructions

  • mulch 1-2" deep around plant, avoiding area closest to stem
  • plant in Full sun to part shade
  • dig hole 2X the width of pot
  • backfill and plant 1-2" above soil level
  • water deeply to settle, then add more soil if needed
  • mulch 1-2" deep around plant, avoiding area closest to base

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