Despite this, the plant is clearly processing the up-down information to decide how to grow—plant roots in general grow down, and shoots, in general, grow up. If you tip a plant over, it will eventually start growing upward again. They are clearly sensing gravity. Plus, they’re integrating that information into the information they’ve already gathered from various other aspects of their immediate surroundings—obstacles, neighbors, the direction of the light, the temperature of the soil. But how?
