‘Very light pruning (two or three small branches) is permissible in summer, but do not prune birch trees in late summer or ...

Yellow birch is a favorite summer food of the yellow-bellied sapsuckers who extract the sap of the tree. After pecking and drilling quarter-inch holes in neatly arranged rows around the trunk or limbs ...

Some of the highest ever levels of birch pollen, which affects about 25% of those with hay fever, could be seen in the summer ... such as the trees' biennial pattern of pollen production and ...

So although budding trees in May have produced all the pollen in the air, as spring transitions into summer, the ever-present pollen will fade. Green pollen - Birch and Oak trees The green dust ...