Dancing Hoskuld
Deity
People have been harvesting peat from peat bogs since the stone age so you must be able to build the peat cutter improvement on it earlier than you can drain it.Yeah I think. You need to drain the peat bog before you can improve it at all IIRC.
edit missed Joe's pots
edit2 there is also some evidence for some mining of iron from peat bogs early on.
Is it possible to have a Stone Tools workshop on the plot until much later? I know you can restrict an improvement to a later tech based on feature but not sure it works for improvements or that said improvements wont grow into later improvements before they should when worked.