Anyone else trying this? I've killed a lot of them, over the years. What happens is that, within a year or so, soil mixes designed for Azaleas become compacted, and stop draining well. This is fatal to Azaleas. I experimented with adding builders sand to the mix, but this made matters worse. I repotted mine about two years ago. They looked awful, with pale, yellowish foliage. I had planted them, two years before, from 8" pots. I found that the root systems were only about two inches deep, the rest having rotted away. My "Azalea mix" had become a soggy, undrainable mess. I spent a little time on the Container Forum, looking for a solution. I found that the mixes recommended there just don't retain water well. So, I decided to experiment a little. I got a bag of Napa floor dry, and screened out the smaller particles. I also picked up some fine pine bark mulch. I had trouble finding some without wood chips, and it was a bit pricey. The final "blend" was about 25% floor dry, 25% old, soggy Azalea mix, and the rest pine bark mulch. I repotted the plants in liners, about 16" wide and maybe 14" deep. I then put them into larger containers, propping up the liners to leave a 2" space for drainage. The plants recovered quickly, and are now about waist high. They are just beginning to bloom, and are going to put on quite a show. The foliage is a deep, healthy green. I've had to water them only about once a week. So far, so good.