As forsythias typically bloom for several weeks before early garden weeds germinate, this early alert gives gardeners ample time to get out in the yard to do preventive maintenance. It’s worth noting that, at about the same time in early spring, Knock Out roses leaf out. This means ubiquitous Knock Outs also provide a good seasonal cue. When their first leaves appear, it’s time to start thinking about weed prevention.

If you miss the early spring weed-stopping window, don’t think it’s too late. Different weeds continue to germinate at different times all season. Even crabgrass continues to germinate spring through fall, so long as conditions are favorable.

While the humble forsythia plays its annual spring role annually, it’s only a reminder to get going. For best results in minimizing weeds over the long haul, develop an annual prevention routine that’s focused on seeds and spot action. Over time, the results can be quite pleasing: as fewer weeds come up each season there’s also less need for weeding.