I am still having alot of trouble w these shrubs, two of them have died and I replaced them. The others have significant die-back ea spring. Currently we have been really hot and dry here, so I trimmed them all last week from 4 ft to 2 ft tall. I am hoping this will let them use less moisture and have less dieback and then re-grow thicker next spring. They seem to have whole canes die off to the ground, the one next to it looks 'fine'. I am still thinking this may be some type of fungus.