red pine

Hi all. All the new needles on my Akamatsu are getting too long, soft, and hanging down. All my JBP on the same bench have hard new needles. It's spring here. What could be happening? Lack of enough sun? Fertilizer too high in N? Pictures attached

Well, I have this JRP cascade that is sitting in this pot for too long. I got it two years ago, the original soil was a mix with mostly Akadama and now it is draining very badly. I guess there are two problems, the old packed Akadama + being root bound, so the needles are showing yellowing tips...