The other of the two sisters plants is the squash. You can see it growing all around the foot of the corn. I give it three feet at the ends of beds. This space contains two squash plants spaced two feet apart. Then I train it to grow into the middle of the corn. I plant the corn and the squash on the same day. The corn is spaced a foot apart. The corn grows a bit faster and it seems to work. My only issue is when the corn doesn't sprout and I have to replant. Then the squash can overtake the corn on the edges. This is why I need a really good sprouting corn. It can't fail or I'd have to rip out my squash too and restart.
I have two full 4'x16' beds planted up as two sisters.
And one 4'x 8' section planted up near the beans. This is 25% more space than I had last year for these crops. So I'm really hoping they do well this year. The corn certainly seems very happy. I expect I'll get a lot of frozen corn for winter. Usually I just get a few packets, but not many. Also this year I didn't space the corn plantings out very much like I usually do. I was originally planning to go to London later in August, but that trip was canceled. I tried to time it so it would all be ripe before we left. So when the corn starts to really come in this week we will be inundated for a couple of weeks then we will have nothing. Last year I had better timing and we ate sweet corn for a month or so almost every day. I think when I plan summer vacations mid July is best as I can time things better to leave a gap in production. August is a terrible time to leave.