Kate Middleton's sweet words for young competition winners

Kate Middleton has met with the young winners of a garden design competition, praising the youngsters for their creativity.

The Duchess of Cambridge appeared on CBBC's Blue Peter with the young winners, who competed to create fun features for the new children's garden in RHS Garden Wisle.

Children up to the age of 15 entered the contest, which Kate judged herself, picking out winners Jessica and Lucy, whom she later met and congratulated.

Jessica's design for a wooden butterfly sculpture with metalwork wings that flowers could grow across caught the Duchess' eye quickly, and she spotted Jessica's use of flowers that would bloom differently in each season.

LISTEN: Tune in to 9Honey's royal podcast, The Windsors, to learn more about Kate Middleton's royal life.

"It's such a great idea," she praised the young girl.

"And it's going to be so lovely coming back year after year to see how it's growing and all developing."

Jessica seemed pleased with Kate's comments, gushing about her design ideas and explaining that she chose a rough wooden centrepiece to keep the sculpture looking more natural.

Kate also remembered winner Lucy's clever designs, praising her for her drawings when she met with the little girl.

The royal shares a passion for gardening with the young winners, having designed her own incredible 'Back to Nature' garden for the RHS Chelsea flower show earlier this year.

Photos of Kate with Prince William and their three children playing in the garden melted the hearts of royal fans everywhere, especially when little Princess Charlotte showed off her cheeky personality.

"Oh la la," she exclaimed, when she saw her mum's garden for the first time, the moment going viral after a video of her cute outburst was shared online.

Later, as she and her brothers played in the garden William asked her to help Prince George, to which Charlotte sassily responded; "No!"