Seeing the Difference in How Much Sun Sweetcorn Gets

hi-ho to vegetables is talking about growing Sweetcorn from Melbourne

Medium_sweetcorn_at_mums_for_yates_behind_potato_bed
Garden in progress

Another gardener has pointed out to me that the differences in the size of my Sweetcorn here have happened because some get more sun (the ones in front on the right) than others.  I will ask my son to rotate the pots (they are a bit heavy for me to shift). All the Sweetcorn were planted at the same time so the spot really does matter.