True, summer may be almost over, but Vanessa Richins' article on tree care in summer is still worth perusing at this time. Why? Because sometimes, it's helpful to be reminded of what you should not be doing at a particular time. And About.com's Guide to Trees and Shrubs has a few important DON'Ts that you should be keeping in mind in August.
For example, "You should take care with using nitrogen fertilizers in late summer -- they will promote new growth which may be damaged in winter," warns Vanessa. Which begs the question of when to fertilize trees. It's best to fertilize trees in spring, when new growth has plenty of time to harden off before cold weather returns.