Just like a watched pot never boils, watched nails never grow. Or so it seems. Whether they’ve been broken down, or wrecked after acrylics or gel, or you’re a perpetual biter, the quest for long nails can seem endless. And for good reason: On average, nails only grow about .12 inches per month. A variety of factors such as age, season, diet, and genetics, also play a role in the growth rate. While there’s no miracle cure that will instantly leave you with lengthy tips, there are certain products you can use to help promote healthy nail growth, not to mention leave your nails stronger, too. Check out 9 of our favorites below, which, dare we say, nailed it.