Northeast of London you have East Anglia which two of its counties are really only known for their agriculture. Suffolk [1] & Norfolk [2]. Southeast you have the flower garden of Kent [3]. I live Southwest next to a train line called the Watercress Line [4] that was named such as it ferried fresh watercress into London.

[1] https://en.wikipedia.org/wiki/Suffolk#Economy

[2] https://en.wikipedia.org/wiki/Norfolk#Economy_and_industry

[3] https://en.wikipedia.org/wiki/Kent

[4] https://en.wikipedia.org/wiki/Watercress_Line