If Some Of The Bark Is Coming Off On The Bottom Of The Trunk, Is It Sick Or Is This Normal For Redwoods?
The redwood is dropping a lot of needles; is this normal? Ron
Certified GKH Gardening Expert
This can be normal, but excessive bark drop would indicate a dying tree. Unfortunately, your photo did not come through, so I cannot see the damage.
Likely, you are seeing the signs of root rot. There are many types, but they are all fungal or bacterial. Armillaria and Ganoderma will be two of the most common things that many will see this time of year.
The problem is that by the time you notice symptoms of the diseases, it is already too late. You can try to correct with fungicides. This article will help: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
These articles will help you to understand root rots: