I do not have a green thumb... but somehow, in spite of me, the poinsettia we planted in the yard last winter has flourished. Grown to at least twice what it was, and the leaves cannot be told from the blooms, all alive in the prettiest shades of green. My thumbs are envious.
Making my way out the door, those leaves stopped me in my tracks. The greens have deepened, the veins have darkened and the leaves are becoming... red. Just in time for Christmas. How do they know?