Good morning!
I have a question about the coast redwoods I planted about a month ago. The trees were purchased from a nursery in Oregon at about 30" y'all each. The trees are planted in Flowery Branch GA.

All of the trees have some browning, mostly towards the base. The trees with the most sun light have the most browning. The trees have been watered daily since planting.
Watering chart with sprayer:
4 trees in most sun with dry soil 3 gallons per day each
3 trees with 1/2 days sun and less dry soil 2 gallons per day each
2 trees in moist soil near creek 1 gallon per day
1 tree in pot - 1/4 gallon per day

Temp has ranged from 65-80 degrees. All the trees have healthy fresh growth on top. I believe all 10 trees have grown 3-6" since planting.

Most of them are planted in a clay environment. When planting, I dug out about 5 gallons of dirt, mixed it 50/50 with "Miracle Gro Trees & Shrubs" soil.

There is only one potted tree, I made the mistake of planting it in 100% storebrand potting soil, it seems to be doing OK, but it does have a little bit of browning on most branches.

My concern is the browning, in the splotchy areas, it looks to be a disease or insect caused. I do not see an insect infestation. Please see the attached pictures and let me know what you think

All evergreen conifers will shed old leaves annually. Different species hold their leaves for differing amounts of time/years.

I don't know the schedule for Coast Redwood (Sequoia sempervirens), but I suspect that your plants are just shedding old foliage on a natural cycle.

Then again: Coast Redwood is in no way adapted to Flowery Branch, Georgia's climate. I expect you will encounter a range of challenges in trying to successfully grow this species in your region.

Update, eight of the 10 trees are still alive. Seven of those eight trees are thriving. One is named droopy. He does not get any sun, and is planted in a very wet area. I'll be moving him soon, he has only grown 2 inches since being planted.

The two trees which have died, had their lower 12 inches of bark chewed off by something. Maybe a chipmunk. The trees are surrounded by fencing, so it had to of been something tiny. I did not think anything of it at the time, because it did not affect the tree until about one week later. Both trees began to droop and Brown. Both slowly died.

I'm looking for ideas on how to treat the trees if the lower bark area gets chewed off on other trees. My first idea was some type of tape. Hopefully someone has dealt with this.

Still have 8 trees growing! The one closest to my septic leach field is the biggest & strongest. Leading me to believe I should fertilize the others. Any recommendations?