green thumb noun
[singular] US : an unusual ability to make plants grow
▪ Thanks to my mother's green thumb [=(Brit) green fingers], we usually had vegetables fresh from the garden.
▪ Thanks to my mother's green thumb [=(Brit) green fingers], we usually had vegetables fresh from the garden.
— green–thumbed 
/ˈgri:nˈθʌmd/ adjective
▪ a green-thumbed gardener
/ˈgri:nˈθʌmd/ adjective ▪ a green-thumbed gardener
