Can You Apply Pre-Emergent Weed Spray To Gravel?

As alternatives to mulch, pine straw, or concrete, some homeowners may instead prefer the look of different types of rocks to use in landscaping. Whether you have a gravel driveway, walkway, or beds in your yard, it's important to know that these spaces can still be prone to the development of weeds. If you already have weeds in your gravel, you may consider post-emergent herbicides, especially in the case of a widespread problem. To prevent weeds in the future, though, you may instead use pre-emergent weed spray in conjunction with physical weed prevention overall.

Unlike post-emergent herbicides, pre-emergent versions are designed to help prevent weeds from growing in a variety of spaces. This includes graveled areas. Most products are designed to prevent weeds for three to 12 months at a time, which means you may need to reapply them throughout the year for best results. In particular, these may work best when used before every spring and fall. Given the potential dangers to both surrounding plants, animals, and human health, you must carefully follow all product instructions. Always wear gloves and other protective gear before handling any commercial herbicides, too.

Applying pre-emergent is only half the battle to a healthier lawn because it isn't the only preventive measure that can control weeds. Overall, it's important to keep in mind that these commercial products are designed for preventive control only. It's also helpful to consider herbicides as complements to other physical control measures against weeds. One way to help discourage annual weed growth in gravel is to occasionally add more rocks. While this doesn't solve the problem of weeds popping up between crevices entirely, adding another layer of gravel does offer some extra support against weeds overall. Experts recommend adding new gravel at least once every three years as a weed preventive measure.

Raking the area is another preventive measure that can physically control weeds without using chemical sprays. In fact, if you have a gravel driveway, you need to be raking it regularly. By raking underneath gravel, you could potentially disturb any weed roots that are starting to take hold. For the best results, make sure the rake is made out of iron, and not plastic. If you're already starting to notice weeds growing in gravel though, the best course of action is to remove them by hand so you can prevent further growth and germination. Make sure you wear landscape or gardening gloves, and grab the weeds by their roots only to ensure you've entirely removed them.