I rototilled all 3 of our gardens today and my 16 by 24 garden seemed rather hard I already planned on adding/did 1/2 cubic yards of well composted horse manure ( pretty much black dirt at this point), last year we had to move this garden and everything seemed to do fine but I can't help but wonder if things would go better this year if I added 2 bales of peat moss or something similar. Any suggestions?