5. Step-by-Step Guide to Dividing IrisesBegin by using a garden fork or spade to carefully lift the iris clump from the ground. Be sure to dig around the entire clump to avoid damaging the rhizomes. Once lifted, gently shake off excess soil and rinse the rhizomes with water to remove any remaining dirt.
Inspect the rhizomes and identify healthy sections with strong roots and at least one fan of leaves. Use a sharp knife or pruning shears to cut the rhizomes into sections, ensuring each piece has a healthy fan and roots. Discard any old, diseased, or damaged rhizomes.
Replant the divided rhizomes in a sunny location with well-drained soil. Space them about 12-18 inches apart, with the top of the rhizome just above the soil surface. Water the newly planted irises thoroughly to help them settle in.
6. Common Mistakes to Avoid When Dividing Irises
One common mistake is dividing irises too late in the season. Waiting until late fall or early winter can prevent the plants from establishing roots before the ground freezes. Another mistake is planting the rhizomes too deeply, which can lead to rot. Ensure the top of the rhizome is just above the soil surface.
Additionally, avoid overcrowding the newly planted rhizomes. Proper spacing is crucial for air circulation and preventing fungal diseases. Finally, be sure to remove any diseased or damaged parts of the rhizomes to prevent the spread of disease.
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