Not even the trees of Gallifrey live as long as Time Lords. One could see three generations of trees die of age in the same regeneration. The only exception he's found is the bristlecone pines of Earth. He tried to grow one near his old home once, but it withered under the heat of the twin suns.
Now every tree on Gallifrey, from the seedling he planted the day before the loop began to the ancient Forest of Remembrance, is burning in the planetary inferno. If only trees could escape the inevitable, even when the ones who planted them cannot.