Potash Farm is situated at the southern end of the St Mary's Platt, which was originally part of the older Wrotham parish. The Potash Farm Plantation extends to about 6 acres and is likely to have been planted in about 1900.The Potash Farm plantation has been beautifully restored over the last five years and now contains about 500 original trees and 500 newly planted trees.

The Potash Farm marmalade and conserves are handmade with the famous Kentish Cobnuts that are grown on the farm. A Kentish cobnut is a type of hazelnut, just as a Bramley is a type of apple. Unlike most other nuts, cobnuts are sold fresh, not partially dried. They are usually in season from the end of August through to October, but stored nuts may be available from selected outlets through to Christmas.