There's not a whole lot to know about transplanting Hostas. Put them in an area that gets morning sun and shade in the afternoon. Use soil that is rich in organic matter and well-drained. To reduce transplant shock: plant early in the day water in thoroughly. You can also use a B-12 fertilizer to promote root growth.
Transferring hostas is very easy. Break the roots apart into small portions. Plant in any shaded or partially shaded ares, at least two feet apart. Hostas do not like direct sun. Plant with the root portion just below the surface of the ground. Water thoroughly.
Once you have a Hosta, it will continue to grow and fill in spaces that otherwise needed a boost. Hostas not only look beautiful, some varieties smell wonderful too;
Keep the soil moist but don't over-water the plant. The plant will be stressed and need to acclimate to the new environment. Fertilize after transplanting.