The Palace took to Twitter to share snaps of the mother-of-three preparing her landscape design.
The 37-year-old can be seen chatting with designers and choosing plants to include in the garden.
The caption read: 'Over the past few months, The Duchess and landscape architects Davies White visited plant nurseries, suppliers and specialist craftspeople who have been growing and building elements of the garden ready for RHSChelsea.'
Landscaper Adam White also revealed that Kate was 'very open' during the process.
He revealed: 'To us, this is very much about childhood memories. We all spoke about our childhood memories, being outdoors and exploring nature.
'She was very open and has been hugely collaborative. This is very much about the three of us, as co-designers.'
The Chelsea Flower Show runs from the 21st to the 25th of May.
You might also enjoy: