If one of your cats loves catnip, you're probably hooked on this easy-to-grow perennial. Catnip (Nepeta cataria as well as other Nepeta species) is actually part of the mint family. It grows like a weed in some areas, and has an untidy habit, spreading quickly to take up any available space. Most catnip varieties grow to a height of about three to four feet, and plants can get top-heavy with
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