I am really hoping for a plough/seeder in Mistlands, fill a hopper with seeds, push it around and it plants at the right interval in a line. Viking age tech.
However, as others have said, click and step works for planting. If you get a not enough room to grow message, that plant is sacrificed. You can also get the message if there is something underneath the soil like a rock or plank of wood. If you plant near something like a cloudberry crop then that can also affect available growing space.