They require consistently moist soil and sometimes two weeks or more for germination. Dry or windy weather can mean slow or no germination for carrots. Carrots, parsnips, and parsley take 14 to 21 days to germinate; that means you must keep the seed bed evenly moist for up to three weeks or longer. Carrot seeds are naturally slow germinators, but you can speed things up a bit by priming the seeds indoors. Starting three to four days before you plan to sow them, soak carrot seeds in water for an hour, and then transfer them to a damp paper towel. … Seeds germinate in one to two weeks, depending on the weather.