There are natural products that you can apply for controlling grubs of June beetles, including insect-devouring — but plant-friendly — nematodes.
Bob Morris
Bob Morris is a horticulture expert living in Las Vegas and professor emeritus for the University of Nevada. Visit his blog at xtremehorticulture.blogspot.com. Send questions to Extremehort@aol.com.
Rose of Sharon is a hardy and fun deciduous shrub for our climate. It’s considered mesic in its water use and not meant for desert landscapes.
If young trees are given a lot of nitrogen fertilizer then new growth will be pushed at the expense of flowering.
Desert climates are notoriously low in humidity, particularly as the day gets warmer, so we enjoy fewer plant diseases and worry about them less than in places with humidity.