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I say let them ride. II say let them ride. I usually hill (or add dirt to a box) when the plant is 12" or more. I cover the bottom 6" leaving a min of 6" of plant above ground. At first you will see slight wilting or yellowing, but with proper water, sun, and time they usually pop back. The one thing to watch is the ammount of sun. Most dont build a compost pile in direct sunlight.

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