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Originally Posted by smurf
Does any one know how close you can plant lettuce together in a water culture system? I am thinking of using this system to grow lettuce just because its ez for them and me.
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That would depend on the type you were growing. You don't want them to be crowded, but you don't want to waste space either. How big does the variety you want to grow get? Then space them that far apart, maybe just under that. They wont mind touching there neighbors, as long as they have elbow room.