I have 4 banana plants, 2 Musa Basjoo which I believe are cold hardy, a Musa Cavendish red and a Musa ensete Maurelli red. All growing rapidly at the moment. I need to pot on the Basjoo ones and I repotted the Maurelli a couple of weeks ago but I am not happy with the potting mix I used as it feels very heavy and I am not sure it is draining well enough. I used equal parts John Innes no 2, horticultural sand and horticultural grit. The pot has plenty of drainage holes but it seems to stay wet a bit too long for my liking. I like the mix my Cavendish is in but it came like that and I don't know what it is...it is quite fibrous and lightweight when getting dry so it's easy to tell when watering is needed. What do you guys use? I am in the U.K. Thanks!