Posted: 05/04/2016 at 07:32
They'll be fine planted just now - the foliage will look attractive over the summer - dig some organic matter into the soil and give them a mulch with the same after planting. They'll be very happy.
You could also consider some Lamium - silver leaves with pink or purplish flowers in the summer - they're quite happy in semi-shade and they look after themselves and come back year after year, spreading to form a carpet of silver and green leaves.
In the autumn you could plant some Chionodoxa or Puschkinia bulbs. Both of these have pretty blue flowers in the early spring and will come back year after year. They'll be happy growing among the hellebores and lamiums and don't need any looking after