Beautiful Dawn Redwood. I don't want it to die!
We've had a very nice dawn redwood growing for the past 5 years. It's grown several of feet every year and is now about 20 feet tall.
Recently, however, the needles in lower branches have become yellowish-brown and shriveled. It seems to be random but restricted to more of the lower branches.
I've attached a photo, it's upside down. Imagine this along the four or five main branches.
Any idea what it is and how to treat it? Is this fatal?