How to Grow an Iris

May 28, 2015

Iris Growing Tips

  • Plant them in a sunny spot in late summer. The plants need well-drained soil and at least six hours of sunlight per day. A full day of sun is even better to keep the rhizomes dry. (The rhizomes are the fleshy rootlike structures at the base of the plant.)
  • Prepare their beds. Doris recommends a low-nitrogen fertilizer and a soil pH slightly less than 7, which is neutral. She applies a granular fertilizer twice a year — in early spring and just after bloom when the rhizomes are forming the next year’s flowers. Water only if it is extremely dry or after transplanting.
  • Give them room to breathe. Bearded iris require good air circulation. Plant them a minimum of 16 to 18 inches apart (less space for dwarf irises and more for taller varieties).
  • Do not mulch. Mulching retains moisture, and too much moisture will cause soft rot of the rhizomes.
  • Break off seedpods that form after the blooms have faded. This prevents seedlings from choking the surrounding soil. Seed formation also saps energy needed by the rhizomes, roots, and leaves.
  • Prune back the foliage in the fall. This will reduce the chances of overwintering pests and diseases.
  • Make dividing a habit. Divide clumps of bearded iris every three to four years in the late summer. (See the next page for detailed instructions on dividing and replanting bearded iris.)

Source: http://www.bhg.com/gardening/flowers/perennials/how-to-grow-maintain-and-divide-bearded-iris/

 

Image Source: http://whatcomflowers.net/iris-flower-meaning-symbolism.html/beauty-iris-flower-pictures

 

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