Minimum Size for Kerem

Question

If one purchased 5 grape vines in order to make a small vineyard in his back yard, excluding the required 4 amot around the vineyard, what is the necessary procedure? At first I though all one needs to do is plant five vines in two rows with the proper space between each row. Now based on my understanding of Mishnah Kilayim Chpt 4 and Mishneh Torah Kilayim Chpt 7, there must be a minimum spacing of 4 amot between each vine in a given row and 4 amot between rows.

Now, using 50 cm for an amah, this would mean that each row would be 2 m apart and each vine in a row needs to be 2 m apart as well.

So would this mean that if one sets up his vineyard as diagrammed below, he would need to set an area of 4 m by 8 m?

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Answer 1

I was discussing this with my rabbi over shabbat. He said each row and each vine on a row needs to be 4 amot apart. What he clarified is from where to measure from. I wasn't sure if it's measured from the trunk or the outermost growth. He said from the outermost growth. So it seems that there is a lot more planning involved than just sticking it in the ground.