A lot. Seriously though, some of the seeds that you plant may not come up, other seedlings/plants may be subject to disease/insects or weather or cultural conditions that would either reduce their productivity or kill them. Also, it would depend on whether you harvested the whole plant, bunches, or individual leaves, and how those leaves were harvested (if you harvest the lower leaves, it will produce more leaves up top). However, basic average yield in a home garden for a 10-foot row, at 8- to 12-inch spacing, is about 4 to 8 pounds. Sources recommend about 4 to 5 plants per person. Hope this helps!
A lot. Seriously though, some of the seeds that you plant may not come up, other seedlings/plants may be subject to disease/insects or weather or cultural conditions that would either reduce their productivity or kill them. Also, it would depend on whether you harvested the whole plant, bunches, or individual leaves, and how those leaves were harvested (if you harvest the lower leaves, it will produce more leaves up top). However, basic average yield in a home garden for a 10-foot row, at 8- to 12-inch spacing, is about 4 to 8 pounds. Sources recommend about 4 to 5 plants per person. Hope this helps!