Ahh, its the dirt tiles that make them spawn. I'll give if a stone floor later.
Yesterday I added a second floor made of glass with with more wheat beds. I harvest every few days and get like 64 wheat :$
Anyone played it in 3D mode?
Wondering if it's worth getting some glasses off eBay....
Sounds fun, think I'll order some glasses then. They're only a couple of quid.
Just hope I can finish my new castle before they turn up :D