Prince Charles is one doting grandpa!

According to a new report, the 66-year-old Prince of Wales recently spent a day bonding with his nearly two-year-old grandson, Prince George, by planting trees and gardening at the royal family's country estate, Highgrove House.

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An exterior shot of the Highgrove House gardens.

Charles reportedly enjoys caring for the home's grounds himself and often enlists the help of other family members and friends to help with the Gloucestershire property's upkeep.

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During a recent trip to the home — which is visited by more than 30,000 tourists each year — a guest told Britain's Hello! magazine that Charles is "obviously very proud of Prince George."

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Charles, George, Kate and William at the polo match on June 14, 2015.

George — who became a big brother to newborn sister Princess Charlotte this past May — was most recently spotted in public playing with his mom, Kate Middleton, 33, as she watched his dad, Prince William, also 33, participate in a polo match.

"Kate was with him and they were lying in the grass together. He's so cute," an onlooker told Us Weekly of the family outing.