I thought I was doing things right, but apparently not since I have been getting a LOT of drying/browning leaves, falling leaves, etc (see attached pictures; this is indicative of many of my maples, though some are doing very well), so I am wondering if I'm not watering enough. Other than the leaves, and a spider mite infestationg that is currently being treated, all the trees appear decently healthy, with new buds forming where leaves have fallen off. I have subscribed to the typical bonsai method of watering potted plants: Stick your finger into the soil, and if it's dry about an inch down, water it. If it's still damp, don't. Therefore, I thought this would work well for my maples (all are in pots currently), and have been watering every 2-4 days, depending on weather, which has been quite hot lately, typically mid 80's or warmer, with low 70's overnight. I know maples don't like wet feet, and I think my mix is a decent one, with good drainage: Organic to inorganic is about a 2:1 ratio, with equal parts pine bark mulch and Fox Farm's Ocean Forest soil for my organic, and equal parts haydite and chicken grit (now replaced by turface, since I can finally get it locally) for my inorganic. I don't want to overwater them and place them under undue stress, but not watering enough is stressful as well. Can anyone offer some tips or advice as to how often I should be watering without drowning them? Should I change my soil mix (not now obviously, but maybe come fall?) to something freer draining?