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The Plant Guide

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Rocky Mountain iris

Iris missouriensis

This variable, beardless iris with narrow leaves to 20 inches long bears 2 to 4 blooms on each branched stem, in summer. The flowers have short, pale to deep blue or lilac-purple standards and larger falls with deep purple veining.

CareGrow in medium-wet, average soil.

PropagationLift and divide clumps, or separate bulb offsets, and plant immediately, in early autumn.

ProblemsIris borer, verbena bud moth, whiteflies, iris weevil, thrips, slugs and snails, aphids, and nematodes.

  • Genus : Iris
  • Plant Height : 1 to 3 feet
  • Zones : 3, 4, 5, 6, 7, 8
  • Growth Rate : Fast
  • Light : Full Sun to Partial Shade
  • Moisture : Medium to Wet
  • Maintenance : Moderate
  • Plant Type : Perennials
  • Bloom Time : Summer
  • Plant Seasonal Interest : Summer Interest
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