•The most active period of growth is during the spring. The wood produced is light in color and of open texture.
•As autumn approaches, the cambium becomes less active and growth becomes darker in color and denser in texture.
•The difference between spring and autumn growth is more pronounced in some species of trees than in others.
•Firs and pines show the growth clearly: in teak and mahogany the spring and autumn growths are barely distinguishable.