The concept, which was launched on Tuesday (19 May), and will remain open until 14 July, represents the hotel's celebration of the summer season.
Williamson and Law have transformed the hotel’s courtyard into a vibrant garden and bar area inspired by the botanical infusions that are found in Hendrick’s Gin.
The courtyard features an array of coloured flowers and taxidermy, such as peacocks complete with brightly coloured tail feathers, meanwhile empty Hendrick's bottles and small vases filled with flowers are scattered throughout.
The Blake's Birdcage is a focal point and includes comfortable cushions with unique prints, and Law's work, which comprises scented dried roses, peonies, hydrangeas and Juniper berries, hangs from above.
The courtyard combines Williamson’s own brand of textiles, which he developed in collaboration with fabric and wallpaper designers Osborne & Little, along with a selection of objects from interior design emporium Rockett St George, curated by the designer himself.
The drinks menu features Hendrick’s-based cocktails that include fresh herbs from the garden, such as the Gin Basil Smash, which is made using fresh lemon and basil.
Law said: "I wanted to collaborate with Matthew to create a fully immersive experience of flowers and nature at every stage of a flower’s life."
Hendrick’s Horticultural Oasis is open from 10am through to 8.30pm every day.