Hi Guys, new member to this forum. I have recently purchased a green acer, quite small still about 5ft tall. I have potted in a large tub, given it the recommended mix of composts etc. I have drilled a dozen drainage holes in the pot. However the leaves are turning brown and dying. The soil feels quite moist, is it too wet? too dry, do I need bigger drainage holes? any help would be gratefuuly received.