I am thinking about next spring when I put all the azaleas I dug up in pots or do something like that. I was thinking akadama, peat moss, lava rock, pumice roughly equal. This makes me think not, just kanuma.
Akadama breaks down after a couple of years, depending on freezing/thawing. How long would kanuma last, particularly 100%? What other considerations are there? Would I stop using acidic fertilizer and use the same as the other trees?
Whatever mixture you are planning to do just put Kanuma instead of Akadama, Azaleas need acidic soil to develop correctly, and yes you will need to repot every 2 years as Kanuma will deteriorate after that period of time.