Planting a foot apart for a garden bed is a bit close, 18 - 24 inches would be better. Even with increase generally slower in the north than south, you will find some of your plants will increase faster than others forming larger clumps that will overgrow the slower growers when planted to close together.
I have planted a foot apart in holding areas while trying to figure out where to put plants more permanently. These are typically spring arrivals relocated to a garden bed in the fall or fall arrivals relocated the next spring.....a constant shuffle as I try to make everything fit in around here
