Weeds thrive in gravel and patio areas, with common types including henbit, purslane, and dandelions. While many gardeners use white vinegar as a natural herbicide, gardening expert Chelsey from Good Grow warns that it only kills the visible parts of weeds without affecting the roots, leading to regrowth. For those seeking a more effective solution, rock salt is recommended as a natural weed killer that can permanently eliminate gravel weeds. Specialists from Joe's Lawn Care endorse rock salt, stating it is highly effective and delivers long-term results. To use rock salt, gardeners should scatter it around visible weeds, which will die within days. However, caution is advised, as the salt can prevent any plants from growing in the treated area for an extended period. This makes rock salt ideal for driveways but unsuitable for areas where flowers or crops are planted. Overall, opting for rock salt over vinegar can ensure a more permanent solution to gravel weed problems.