I saw a mod here a few weeks ago that allowed grass to grow underneath your vegetables in growing zones, just like how vegetables can grow under trees. Been trying to find it forever. Has anyone seen this mod?
Do you mean this one? https://ludeon.com/forums/index.php?topic=37719 (https://ludeon.com/forums/index.php?topic=37719)
Lets say you have a rice growing zone with sowing allowed, rice is 50% grown. Wild grass wont spread into this zone. The mod I saw made it so wild grass CAN spread into growing zones underneath whatever you're already growing there. Growing grass in its own zone is a feature in many many mods.