The grass is always greener... wherever you use top dressing. Which is why, yes, applying it to your tired-looking garden needs to go to the very top of your list of preferred lawn care tips.
Anyone who's ever consulted a lawn care calendar will tell you, in no uncertain terms, that the best time to top dress your lawn is typically in late spring or early autumn when the grass is actively growing. So, yes, right about now, actually.
