The phrase seaweed gardening can be misleading. It suggests a tray on a windowsill, a bucket of seawater, or a tidy underwater bed that behaves like lettuce. Real seaweed belongs first to the coast. It lives in tides, light gradients, currents, salinity, temperature, and marine food webs. To understand it as a gardener, begin there. Seaweeds are marine macroalgae rather…
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