Common Coal vs Rare Coal — What Matters in Grow A Garden If you’ve been spending time in Grow A Garden, you’ve probably noticed that coal comes in more than one flavor—common and rare. At first glance, you might think, “Well, coal is coal, right?” But trust me, there’s a bit more strategy behind which type you want to use. After a few weeks of experimenting, I’ve picked up some tips that make a noticeable...