Adrian Cole, director of Truffle UK, which supplied the 97-year-old with the trees, said: "They have been highly successful.
“The majority have been The Tuber Melanosporum which is the French Perigord black truffle which is as good as you can get.
"From what I gather, none have been sold. In other words they have all gone to the house or members of the family
"You need a dog to hunt them. If you only go once every three or four weeks you are not going to produce very much, but if you go on a regular basis during the growing season you will increase your yield no end."
Mr Cole also revealed it was the first time black truffles have been successfully harvested in the UK.