Why are some leaves on various branches of my Catalpa turning brown.

Originally native to the lower Ohio River valley and central Mississippi River Valley, this tree has been widely distributed through human intervention. Farmers first brought it into Ohio, commonly using it for fence posts. By way of intentional planting and"escapes" this tree has become established in most of Ohio's. Why are the leaves falling off my catalpa tree in early august in northeast ohio. leaves falling off catalpa tree in early august. please help; tree losing leaves early; asked Aug 13, by anonymous.

Facebook Twitter Reddit StumbleUpon. answer. Your answer. Aug 09, The fall color of northern catalpa trees is typically yellow or brown. However, the leaves of both the southern and northern species often fall from trees while still green. The catalpa’s large leaves and spreading canopy make these ideal shade trees for residential shrubclean.barg: ohio. important concept to understand is leaf arrangement.

All of Ohio’s trees can be placed into one of three categories: alternate, opposite, or whorled (Figure 1). Most tree species have alternate leaf arrangement.

About one in eight are opposite. Only one species in this key, northern catalpa, is classified as whorled.