The 66-year-old presenter shared the news in the final episodes of season five, which were released on Prime Video. He told farm manager Charlie Ireland and farm hand Kaleb Cooper that the cancer was aggressive but found early.
Clarkson said he had known about the diagnosis since May after a medical check and biopsy.
In the episode, Clarkson explained that he had hoped to finish harvest before starting treatment. Instead, the timing meant surgery would come in the middle of farm work.
Kaleb appeared stunned when Clarkson told him the news. Clarkson tried to stay calm as he explained that treatment would begin soon.
He later said doctors removed the cancerous part of his prostate through ultrasound treatment. He told Kaleb that about 10 percent of the prostate had been targeted.
The diagnosis came after another major health scare. Clarkson also dealt with coronary heart disease during the same year.
He reflected on that difficult stretch during the season, saying the year began with heart disease and ended with cancer. Still, he urged those around him to focus on the good things that had happened on the farm.
The final episode ends with Clarkson back in a hospital bed after complications from treatment. He told viewers he hoped to return for season six if all went well.
Clarkson’s diagnosis has renewed attention on prostate cancer screening and early detection. He said the cancer was caught early, which can make treatment more effective.
The NHS says prostate cancer often develops slowly and may not cause symptoms for years. Men are urged to speak with a doctor if they have concerns or risk factors.
Prostate Cancer UK says age, family history, ethnicity and other factors can affect risk. The charity encourages people to learn their risk and seek medical advice when needed.
Fans responded with concern and support after the episodes were released. Many praised Clarkson for discussing the diagnosis openly.
The moment stood out because Clarkson’s Farm is often known for humor, arguments, machinery problems and farming chaos. This time, the show ended on a quieter and more uncertain note.
Clarkson’s message was serious beneath the jokes. After a year of heart trouble, cancer treatment and farm struggles, he left viewers with a reminder that early checks can change everything.