I prefer mine to be a bit crowded so they help keep each other supported. I use 3-4".

Dave

I do square foot gardening and plant 9 to a square.

Bush bean spacing is also a current concern of mine. I'll be planting them in a couple of weeks in a dedicated 2'x2' (a tad less in reality) raised bed. That 9/sq.ft things kind of scares me, considering how large my bean plants got last year at nowhere near this density. Perhaps I'll go with 4/sq.ft, knowing that 16 plants should produce enough for my needs and be tight enough to self-support.

I use 2-3" spacing on Provider and Contender but 4" spacing on Maxibel fillet types because they have more of a vine type growth habit.

Thanks for the input. Sowed them about 3 to 4 inches apart roughly and separated rows 20 to 26 inches apart(my eyes are the tape measure). This is about a week and a half earlier than I usually plant and it's been low to mid 70s for a couple days and yesterday was 82 so the soil is around 65 to 75.. But in central WI they are projecting a warmer than usual late spring and summer.. I have milk jugs to cover the rows with if need be. It's about to rain or I would plant the cucerbits. Holding off on my toamto and pepper transplants another week as they are harder to replace than seeds. The types I am growing I can't just go get replacements at a box store