Why was the plantation system only adopted in the southern colonies?

Originally, agricultural plots in the South were farmed by individual farmers, perhaps with a few additional workers to help them. These early farms mainly grew cotton and tobacco; however, as tobacco became increasingly profitable in Virginia and elsewhere in the South, farmers required additional labor. They first turned to indentured servants, who were Europeans who had agreed to work for 2-7 years in return for passage to the New World.

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