Hi everyone, Lately for my Japanese maples I have been using only Ocean forest Potting soil, with Scott’s colored mulch on top. I was hoping for suggestions to further the health of my maples. I live in California zone 7b, some high winds at times, very dry, and hot during the summer. Cools down at night and mornings can be pretty cool. In this type of environment what will help hold moisture, but won’t dry up? I seem to do ok watering every 3-4 days currently with no issues as of yet. Thank you!