-Golden road floral center sells bags of growth mulch for free.
0.0.5 and 0.0.6
Edit : Celadon floral center does propose the same service with more choice. It also is free.
Nothing much it's just that the dialog says "buy" so I expected the lady to tell me the price and then take my money but she won't.
She insist on giving me as much bags of growth mulch as I want. 