Dividing and Transplanting Bearded Iris: Timing and Technique

When to Divide Iris Clumps

Best times: after flowering (early summer) or early fall. Avoid the hottest months.

Step-by-Step Division Process

1. Cut foliage back to 5 inches.
2. Dig the entire clump.
3. Separate rhizomes with a knife or shovel. Discard the old, dark, center portions.
4. Keep at least one fan of leaves per division.
5. Replant shallowly, water well.

Replanting for Best Results

Space divisions 12–18 inches apart in full sun with good drainage.

Post-Transplant Care

Water weekly until established. Do not mulch over rhizomes—they need sun exposure.