His Majesty, 77, welcomed football star Sir David, along with Royal Horticultural Society ambassador Alan Titchmarsh and garden designer Frances Tophill.
Admitting to 'knocking on a bit', Alan Titchmarsh revealed last week he was selling his £4million home because he feared he wouldn't be able to look after its four-acre garden much longer.
The All England Club is on a mission to become more sustainable and has made the decision to replace a popular food with crushed peas at this year's tournament, according to The Sunday Times .
Gardening guru Alan Titchmarsh has spoken of his admiration for King Charles for 'battling on' despite the inevitable fatigue caused by his cancer treatment.
King Charles hosted an investiture ceremony at Windsor Castle this mooring where he recognised leading figures and community stalwarts for their efforts including his friend Alan Titchmarsh.