Sugar Anne is a dwarf snap pea. The vines will get from 18 inches to two feet. In open ground planting they work well in rows with one inch spacing between plants and 8-12 inches between double rows. However you do need at least two feet beteen those double rows so you can get in to harvest. In this scenario the vones tend to hold each other up. In a four foot bed you may be able to reach across the bed. In such a case with single 12 rows you will have a 4 ft mass of peas similar to the broadcast method which many folks use for this type of space. If you feel the need for aditional support, Twiggs from pruned trees , stuck in the ground between plants works well.

.... and the advantage of using prunings (pea sticks) is that there's no untangling at the end of the season. Just lob the whole lot on the compost heap.

Pea sticks in use:

I have never seen the twigs idea, I love it!!! Might have to try that... I let mine just sort of lean on each other, and it's not particularly tidy looking.

Despite what the packages say, my Sugar Ann's have never been less than 3', so I put them on a wide-spaced wire mesh, usually one of the triangular folding tomato cages than I bought in a fit of foolishness since they aren't strong enough to support tomatoes.

I plant the peas in a band several inches wide and each band is a couple of feet apart. I presoak them before planting, and after the photo below, I cover them with soil.

Thanks for sharing your very interesting picture. I would never have thought to grow them so close together, but in a row. I'll try it next time!

Linda