Hi all. I'm brand-new to the forum and to gardening in general. Please help me diagnose the problem with my Japanese maple, orange dream. Background: Tree is from a local nursery in Richmond, BC and was planted into a container last summer. It is in potting mix within a cuboid container whose dimensions are at least 2-fold that of the original root ball. It did well its first summer/fall and I think it wintered well. The container is placed within a covered patio facing east, modest wind exposure, and abundant morning sun, generally sheltered from sun for the rest of the day. Problem: This spring, as it was beginning to leaf out, the leaves have not appeared particularly healthy, ultimately browning from the tips, becoming wilting, then brittle/dry, and eventually falling off. I've attached some pictures depicting this in its various stages, as well as healthier looking leaves. I'm worried I've been overwatering it. Conversely, I also wonder if perhaps I'm underwatering it. This spring, my usual practice is to water it deeply (perhaps 4-6 litres) every 7-10 days. Between waterings, the soil does not appear particularly dry. I've not applied fertilizer. Any advice would be greatly appreciated!