You just need a little background on the kinds of potatoes out there and how long they take to grow. Short-season potatoes, like Yukon Gold or Onaway, take 70-90 days to mature; mid-season potatoes, like Carola, take 90-110 days; and long-season potatoes, like Russets, take 110-135 days. To start, you’ll need to get your gardening gloves on some seed potatoes in the variety you want to grow.