What are you good at if you've got a "green thumb"?

In English, someone with a "green thumb" is someone who has an exceptional aptitude for gardening or is great at growing plants successfully. For example: "Houseplants provide much pleasure for the city dweller with a green thumb," "He was happy to leave the plant decisions to Solberg, the green thumb of the family." The adjective is "green-thumbed."

Source: Dictionary