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If you need to move a Hellebore, it is best to do so in September or October.

Many gardeners tie up or use round supports for their Hellebore plants.

https://www.gardeningknowhow.com/ornamental/flowers/hellebore/growing-hellebores.htm

The leaves should be left on the plant through the summer and fall. The plant needs them to store energy for next year. You can optionally cut the flower stalks down.

You can trim the old leaves from the previous year in late winter/early spring each year. This improves the plant's appearance in time for the new leaves and flowers to grow.

It is best to move them in fall. This article should help
https://www.gardeningknowhow.com/ornamental/flowers/hellebore/dividing-hellebore-plants.htm

The hybrid Hellebore you plant will not revert to the plain variety. Since these are perennials, you will be enjoying the hybrid flowers for years as long as the plant is well cared for. However, the seeds of the hybrid variety may produce plain flowers (or other variations) if planted.

Just about any all purpose fertilizer will do, but make sure whatever you use has less nitrogen than potassium and phosphorus.

This article will give you more information on their care:https://www.gardeningknowhow.com/ornamental/flowers/hellebore/growing-hellebores.htm