I received a notification that my garden was dry and needed watering, so I wandered back home to attend to it.
I found that all my plots were dry, apart from one. I had planted cabbage seeds in all plots at the same time, and all the dry patches were still showing just the seeds, whilst the wet one had a small seedling in it. As I watered each plot, the seeds immediately transformed into a full grown cabbage, ready for harvesting.
skitch.com/dopiaza/r6r41/ga...
The popup shown when selecting a dry patch showed that it was less than half grown, but watering resulted in a growth spurt that caused it to overtake the seedling which had remained wet throughout.