Japanese maples in containers
hello!! I have 16 Japanese maples in containers on my patio and they range from 2 years old to about 5 years old. They are your typical varieties, like red dragon,viridis,crimson queen, waterfall,orangeola,trompenburg,sharps pygmy,red Pygmy, ect. I have a couple of questions to improve their health this season. (1) I want to switch them to a more gritty mix and am confused due to all the post concerning this mix. can someone give me the basic ingredients and ratios plus any substitutes incase I can't find all of them?
(2) When I switch them over to the gritty mix what fertilizer program do I need to follow? (3) although these trees are pretty young would it be good to root prune alittle before I put them in the gritty mix? I can get pine bark fir, but I was wondering instead of crushed granite, could I use the really small natural brown gravel for aquariums from Walmart?