Helenium plants have a tendency to spread and take up a significant amount of space in the garden. They have underground rhizomes, which are thick, horizontal stems that grow below the soil surface. These rhizomes enable the plant to send out new shoots and expand its presence over time.
If left unchecked, Helenium can gradually colonize an area, crowding out other plants and becoming dominant. This can be especially problematic in smaller garden spaces or when planting in mixed borders where other plants may become overshadowed and struggle to thrive.
To maintain the health and vigor of Helenium plants while also controlling their spread, it is recommended to lift and divide them every few years. This process involves carefully digging up the clumps of Helenium, separating them into smaller sections, and replanting them in desired locations.
Dividing Helenium serves multiple purposes. Firstly, it helps to control their expansion by confining them to specific areas of the garden. Secondly, it prevents overcrowding, which can lead to decreased flowering and overall plant health. Dividing also allows for rejuvenation of the plants, promoting better growth and more abundant blooms.
When dividing Helenium, it is important to choose a time when the plants are not actively growing. Late autumn or early spring are generally the best seasons for this task. Start by digging around the clump, being careful not to damage the rhizomes. Lift the clump from the ground and gently separate it into smaller sections using a sharp knife or garden spade.
Each divided section should have several healthy shoots and a portion of the rhizome attached. It’s preferable to cut the rhizome into smaller pieces rather than trying to divide it lengthwise, as this can be more successful in promoting new growth.
Before replanting the divided sections, prepare the new planting area by loosening the soil and incorporating organic matter, such as compost or well-rotted manure, to improve drainage and fertility. Plant the sections at the same depth as they were previously growing, spacing them adequately to allow for future growth.
After replanting, water the divided Helenium thoroughly to help settle the soil around the roots. It is also beneficial to mulch around the plants to conserve moisture and suppress weed growth.
In my personal experience, dividing Helenium every few years has been essential in managing their spread in my garden. I have witnessed the clumps becoming more and more expansive over time, gradually encroaching on neighboring plants. By lifting and dividing them, I have been able to control their growth, maintain a more organized garden layout, and ensure the health and vitality of the Helenium plants.
To summarize, Helenium plants have a tendency to spread due to their underground rhizomes. Dividing them every few years is a recommended practice to control their spread, maintain their vigor, and prevent overcrowding. This process involves lifting the clumps, separating them into smaller sections, and replanting them in desired areas. By regularly dividing Helenium, gardeners can ensure the plants remain healthy, promote better growth and flowering, and prevent them from dominating the garden space.
