Typically, hellebores live a lengthy life. They remain healthy and flower freely because to the regular mulching. It is recommended to transplant or divide a hellebore in September or October even though this is not typically necessary for the plant’s health. The best way to divide a plant is to dig it up completely, wash the crown to remove any remaining dirt so you can see what you’re doing, and then cut between the growth buds with a sharp knife. The plant will heal faster if you leave at least three buds in each division.
When ought hellebores to be relocated?
Each year, cover the soil surrounding plants with a thick layer of mulch and top it off as needed (for more information, see our guide to mulching).
An organic mulch, like homemade compost, is a fantastic way to enrich your soil with nutrients and beneficial microorganisms. Additionally, it conserves moisture and prevents weed germination.
Overwintering
Most of the commonly seen hellebores are resilient and don’t require further protection, notably the Oriental hybrids (Helleborushybridus).
H. niger dislikes sitting in cold, damp soil, therefore it need great drainage over the winter. Therefore, it is preferable to plant it in a container and maintain it in a protected area all winter (such as at the base of a south- or west-facing house wall)
H. thibetanus, a species that dislikes the wintertime rain, or H. lividus, a species that is only moderately hardy, do best when overwintered in a cool glasshouse, porch, or coldframe.
Caring for older plants
Helleborushybridus are often long-lived plants when planted in the right environment. Divide huge, aged clumps in the fall or spring to revitalise them.
Some other hellebores have a lifespan of five years or less. In late April, prune old flowers and leaves to promote fresh growth.
Oriental hybrids
To guarantee that the nodding flowers are fully shown, trim back the old leaves of Helleborus x hybridus in late winter or early spring. Additionally, this aids in reducing Hellebore leaf spot illness
These hellebores frequently self-seed, and the progeny can develop and cover the parent plant. To prevent unwanted seedlings, dig up and relocate seedlings before they grow too big or destroy seed pods before they open by cutting stems at the base.
Other hellebores
Remove the old flower stems and wilted leaves in late April after the flowers have faded to encourage new growth from the roots. If you want plants to self-seed, leave some seedpods.
By division
Most hellebores can be easily propagated by digging up the clumps and splitting them (for more information, see our guide on dividing perennials). Though you may also apply it in spring, immediately following flowering, early autumn is the best time to accomplish this.
Place the smaller clumps you have created so the first roots are 2.5 cm (1 in) below the soil’s surface when you replant them. For the initial growth season, water often until the plant is well-established.
Helleborus argutifolius, H. foetidus, H. lividus, and H. sternii can all be grown from seed but are not recommended for division.
How are hellebore plants transferred?
The greatest moment to divide a hellebore is when it is being transplanted. Moving these plants can be difficult, so it’s recommended to only do so when absolutely necessary. Dig up the entire plant, remove the soil, and then cut the root mass into two or three portions using a clean, sterile knife.
The next step is to plant each little transplant in a spot that is somewhat shaded, on well-worked soil, and rich in organic matter. Water the plant more frequently as it adjusts. In comparison to seed propagation, flowers should appear the following season once each part has been corrected and restored to full health.