A tree classification system based on the tree’s relative height, foliage density, and ability to intercept light. Crown-class measures previous growth performance and calls attention to crop trees that could benefit from future thinning and harvest operations. There are four classifications: (1) Dominant Trees – Larger than average trees with broad, well-developed crowns. These trees receive direct sunlight from all sides and above. (2) Co-Dominant Trees – Average to fairly large trees with medium-sized crowns that form the forest canopy. These trees receive full light from above, but are crowded on the sides. (3) Intermediate Trees – Medium-sized trees with small crowns below the general level of the canopy. Intermediate trees receive little direct light, are poor crop trees, and should be removed during thinning operations. (4) Suppressed or Overtopped Trees – Small trees that grow below the tree canopy and receive no direct sunlight from any direction.