Iris plants are known for their ability to spread and multiply over time. This is mainly due to the presence of underground stems called rhizomes. These rhizomes serve as a storage organ for the plant and also allow it to propagate and form new plants.
Over time, as the iris plants grow and mature, the rhizomes can become crowded and congested. This can lead to a reduction in flowering and overall health of the plant. To prevent this from happening, it is recommended to lift and divide the larger clumps of iris plants.
Dividing iris plants not only helps rejuvenate the old planting but also provides an opportunity to expand your garden or share the extra plants with friends and neighbors. It is an excellent way to propagate and multiply your iris collection.
The process of dividing iris plants is relatively simple. It is best done during the late summer or early fall when the plants are not actively growing. Here’s a step-by-step guide on how to divide iris plants:
1. Digging up the clump: Start by carefully digging up the clump of iris plants using a garden fork or shovel. Be cautious not to damage the rhizomes while doing so.
2. Cleaning and inspecting: Once the clump is out of the ground, gently remove any excess soil and inspect the rhizomes. Look for any signs of disease or damage, and discard any unhealthy or rotting rhizomes.
3. Dividing the rhizomes: Carefully separate the rhizomes into individual sections. Each section should ideally have a healthy fan of leaves and a portion of the rhizome. If a rhizome is too large, it can be further divided into smaller sections.
4. Trimming and preparing: Trim the leaves of the iris plants to about half their original length. This will help reduce stress on the newly divided plants. Also, trim any damaged or dead roots.
5. Replanting: Select a new location in your garden or prepare pots for replanting the divided iris plants. Ensure the soil is well-draining and amend it with organic matter if needed. Plant the rhizomes just below the soil surface, with the fan of leaves pointing upwards.
6. Watering and care: After replanting, water the iris plants thoroughly to help them settle in. Provide regular watering during the first few weeks to encourage root development. Mulching around the plants can help retain moisture and suppress weed growth.
7. Maintenance: As the iris plants grow, continue to provide regular watering, especially during dry spells. Fertilize them with a balanced, slow-release fertilizer in early spring to promote healthy growth and flowering. Remove any dead or faded flowers to encourage more blooms.
By following these steps, you can successfully divide and propagate your iris plants. It is a rewarding process that not only helps maintain the health and vigor of the plants but also allows you to expand your garden and share the beauty of irises with others.
