As much of the U.S. (and Europe) copes with warmer heat waves, you may be looking for plants that can thrive in hot sun. Blue plants often fit this profile since they create a waxy coating that protects them from hot sun and helps them hold water. And what’s even more enjoyable for us is that waxy coating makes them appear blue, thus creating an unusually pretty accent in the garden. So if you want a tough, interesting looking plant, try these three below. They pair well with dark-leafed plants…