Not sure where I read it, but (IIRC) medieval towns had not just farmfields surrounding them but also a ring of cultivated forest. These were not wild woodlands, but careful agricultural efforts, with trees typically being regularly coppiced. These plantations were a source of wood as materials (poles etc), and also firewood (which any medieval town would need a lot of).
Would you be interested in adding foresty rings as an option (i.e. along side of farm fields)? Visually I guess they'd be depicted as a dot filled ring section, as well as lots of dotted boundaries to rural roads/fields.