The TV presenter, known for his work on Top Gear and The Grand Tour, owns Diddly Squat Farm here in Oxfordshire, where Clarkson’s Farm is filmed for Prime Video.
The series has become a major hit since its launch in 2021, with five seasons to date and a sixth currently being filmed in the Cotswolds.
Last Friday (September 4), Mr Clarkson hosted Hawkstone Harvest Festival at The Farmer’s Dog pub, his Oxfordshire venue near Burford.
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The 66-year-old welcomed thousands of visitors for an event featuring live music, food and drinks from his Hawkstone brand.
At the festival, Mr Clarkson appeared on stage alongside fellow TV presenter George Lamb and Groove Armada musician Andy Cato.
Mr Lamb asked the former Top Gear host what his biggest farming mistake was, which prompted a laugh from the crowd, including Clarkson’s Farm star Kaleb Cooper, who was watching on.
“F**k off, Kaleb,” joked Mr Clarkson from the stage.
He then added: “It might be this year when we had Cereals, a huge farming exhibition, I guess is the right word, at Diddly Squat.
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“30,000 farmers came, and I decided to go and drill the barley in the field that they’d all have to drive by.
“Every single farmer in the country would drive past it, and I did the drilling, and I didn’t level the drill.
“On a couple of occasions, I forgot to turn the fan on and apparently didn’t drive in a straight line either.
“You’ll see this in season six, but Kaleb did a speech when he’s almost in tears saying, ‘I’m not from a farming background; lots of farmers don’t think that I’m a proper farmer; you’ve completely messed this up; they’re all going to think that I can’t farm’, and it’s one of the most heartfelt tragic things you’ve ever seen.
“I felt so ashamed, so genuinely ashamed, [that] I had to go home and have 42 pints of Hawkstone to make myself feel better, but I think that was probably my worst mistake, genuinely.”