Katie Couric has an incredible green thumb, but like many of us who have tried gardening she faced some issues when it came to flowers in her garden wilting.PHOTOS: 13 best-dressed celeb mother of the brides: From Katie Couric to Carole MiddletonBut while browsing TikTok, the star found a solution, and she decided to give it a try. In the video, she explained that her hydrangeas had wilted so she submerged them in a bowl of water in a bid to bring them back to life.