#9 |
I would have thought most of them, specially if you have a slightly big square yard. Using 4" spacing, 9 to a sq. ft. gives 81 to the yard.
http://www.mysquarefootgarden.net/onions/
6 inch spacing would only give 36.
http://www.mysquarefootgarden.net/onions/
6 inch spacing would only give 36.