Why was agriculture more successful in the Middle Colonies?

The Middle Colonies, which included Pennsylvania, New York, New Jersey, and Delaware, were the most prosperous colonies in terms of growing crops. Wheat, barley, oats, rye, and corn were grown throughout the Middle Colonies, and the land provided enough crops to not only feed the colonists but also to export the crops to Europe. Because of their success with growing these crops, the Middle Colonies became known as the "breadbasket" colonies. The fertile soil and good growing climate were the main reasons that the Middle Colonies were more successful at growing crops than the New England and Southern Colonies. The land was also easier to expand than in the other colonies.
In the New England Colonies, the soil was rocky and the growing season was short. Farmers were only able to produce enough food to survive. In the Southern Colonies, large plantations dominated the land, but there were also smaller farms. Southern Colonies grew mostly cash crops, such as tobacco, rice, and indigo, which were primarily exported.