Whenever they want, idiot!
Deciduous trees fall in the Fall. The trees lose their color and lose their leaves. That's why there are many trees that are bare in the Fall.
Autumn which is also called "fall" because the leaves fall from the trees.
Fall
Autumn, or Fall. That's pretty much why they call it Fall. the leaves FALL off trees.
deciduous trees.
Evergreen trees do not shed their leaves in the Autumn.
Deciduous trees shed their leaves in the fall.
Deciduous Tree's loose their leaves in the fall, Evergreens do not
Yes some plants have leaves which fall of like mango leaves . But there are some plants of which leaves do not fall , like oak leaves.
Autumn.
They are called coniferous trees. Deciduous trees lose their leaves in autumn. Coniferous trees KEEP their leaves in autumn.
Deciduous trees leaves fall in the autumn and rot on the ground and form a mulch which in turn feeds the tree.