Bush bean row spacing?
I've planted several varieties of bush beans at 2-3" spacing a few inches from either side of a 3-foot-wide bed (surrounded by grass paths) in which lettuce has been growing. The bean plants are now about 4" tall, and I've been pulling out the lettuce as it bolts.
Now that the lettuce has finished, I was planning to sow another row of beans down the middle, so that I'd have three rows about 15" apart. Or I could just leave the middle empty, leaving two rows about 30" apart, with fertile soil between. Which do you suggest -- should I plant the middle row, or leave it out?
Also, should I thin the existing rows to 4-5", or leave them at 2-3" between plants?