Answer: Unfortunately "weeds" seem to love to grow in gravel areas like this. In my experience, most of the home made recipes such as vinegar or ammonia will work on immature weeds but the effect is only temporary because more germinate shortly thereafter to fill in that empty spot! I suppose you could opt to live with the weeds, but another possible solution is to plant something more desirable. You might consider creeping sedums, creeping thyme, chamomile, columbine and so on as "space-taker-uppers" and encourage them to grow instead. Although your gravel will still be full of plants, at least they will be plants you have chosen!
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