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Sorry about rice, Celery is a marsh plant. I have flooded fields of celery in the past when I worked in Agriculture. never done it no harm, a bit late to set it now though
Don't worry about the rice theory - I was seriously thinking of that, but I really hate wading bare foot in mud with things like worms and especially slugs. Yuk
Sorry to say, I don't like celery. I love soup, but not fresh celery.