Brown Leaf Tips, Sisso Tree
I'm in East Mesa, Arizona. My 15 gallon Sisso planted in September now has brown tips on some of it's leaves. Water: 16 gallons every 7 days but with cooler weather will be every 10 days. Why the brown tips?
Certified GKH Gardening Expert
Most likely, it is a watering issue. Newly planted trees require more water than those already established. This article should help: https://www.gardeningknowhow.com/ornamental/trees/tgen/watering-newly-planted-tree.htm