Plant Calculator

Enter the approximate length and width of the area you will be planting and click 'Calculate' to determine how many Iris x robusta 'Gerald Darby' you will need.

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Approx. Width (ft):
*Distance Between Plants (in):

*Correct and successful spacing is complex and depends on project conditions.

Iris x robusta 'Gerald Darby'

Iris

Iris versicolor 'Gerald Darby'

  • Herbaceous perennial
  • Violet-blue flowers
  • Sword-shape leaves emerge black-purple gradually turning green
  • Ideal in moist to wet gardens

  • Category: Perennials
  • Hardiness Zone: 4-9
  • Height: 2-3 ft
  • Spread: 18-30 in
  • Bloom Color: Violet
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