Help with a few sick trees Tridents

[grizzlywon]

Here are a couple tridents that have some leaves that are dried on the tips. They are both in good soils. One is in morning sun and then shade after about 3PM. The other one was in the same spot but I moved it into almost full shade to see if it will perk up.

There are some new leaves and leaves that look normal but the older leaves are like this.

I think they might need more water and humidity?

please help.