I cut this new bed in last fall. Joining my Veggie and main corner garden ( it was a pain cutting the grass under the shrubs anyways)
I put in 30 bags of black earth (on sale $1.00/bag) a big block (3.8 litre) of compressed peat moss and 8 bags of manure to amend the crappy clay soil, still not great but better than before.
I had lots of Hostas to move in some mature some not.
Hopefully by next year it will all fill in nicely.