Catalpa trees can thrive in altitudes up to 7000 ft, making it an exotic tree for your Denver yard. Catalpas (also known as Catawba) are native to warm areas such as Atlanta and Houston but volunteer throughout North America.
Catalpa are hampered by catalpa sphinx moth. The larva stage in the early spring, is the best time to treat this infestation, before it eats the leaves and robs the catalpa of energy reserves. Providing catalpa tree care is important when you first see caterpillars. In order to treat the catalpas, notice if you see any caterpillars and then use Orthene.
Catalpa also is prone to verticillium wilt, a deadly fungus which might radically withers leaves. A trunk injection with ArborJet is an absolute, must for best control. This contains the only anti-fungal agent we know if that stops the tree from going into decline.
Powdery mildew is a common catalpa problem. It appears as a powdery substance on the leaf surface.
Tree trimming catalpa trees is straight-forward with it important that selective trimming to maintain the desirable structure.