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Lawn, Gardening & Pests News

What is Heliotropism?

A sunflower blooms large.

Light from the sun provides the solar energy used by plants for photosynthesis. Heliotropism, or solar tracking, is when a plant follows the movement of the sun during the day. Rooted in ancient Greek, “helio” refers to the sun and “tropism” means a turning or movement of a living organism toward or away from an external stimulus, such as light, heat or gravity.