On the second of two days visiting Northern Ireland, The Prince of Wales visited a 100-acre organic farm, run by the Laughlin family at Kilrea, Co Antrim.
The Prince, who runs his own organic farm at his home at Highgrove, showed great interest in the farm which has been run by the same family since the 1920s.
Earlier in the day, His Royal Highness visited Ireland’s only surviving water-driven spade mill at Templepatrick, Co. Antrim, which is now run by the National Trust.
Chief spade maker, Colin Dawson, presented The Prince with two different spades from the 171 varieties made at the mill.
His Royal Highness then moved on to Ballylumford Power Station near Larne, Co. Antrim, to officially switch on its new £200 million gas-powered turbines.
Owned by Premier Power - part of British Gas - the plant is the first new power station in Northern Ireland for 20 years.
The Prince ended his two-day trip to Northern Ireland with a garden party at Hillsborough Castle.
Before touring gardens and talking to some of the 2,500 guests, His Royal Highness officially opened a newly refurbished art gallery inside the castle which exhibits the work of Derek Hill, an English artist with strong connections to Ireland.
The Prince was also invited to plant a tree assisted by Stewart Finn, gardener, at Hillsborough Castle.
The Prince chatted with many of the guests who shared his passion for conservation and the environment - the theme of the garden party.