Does anyone know what’s causing the foliage on these young bald cypresses to turn grey?

[raenstorming]

The spot they’re in right now isn’t getting full sun, so I don’t think it could be sunburn, but could be wrong. I grew these from seed in a pond basket last spring. Nutrient deficiency perhaps? Others of similar age in the ground around the yard aren’t experiencing this discoloration, or at least not yet.

 

[WNC Bonsai]

My first guess would be sunburn damage.

 

[Wires_Guy_wires]

A friend of mine called me last week to diagnose a line of damaged plants and grass in his front yard.
He was using a mirror to provide light to his veggies, but the rest of the yard was adjusted to shade and got burned.
Could be a neighboring window, or a piece of metal somewhere that reflects enough light to do a burn.

Sometimes when dosing nutrient solutions, people can hit some foliage. If the solution is concentrated enough, it will burn the foliage too if it's not rinsed off in time.

 

[rockm]

Look up “bald cypress rust mite”

Bald Cypress Rust Mite | NC State Extension Publications

This factsheet describes the biology of the bald cypress rust mite, <i>Epitrimerus taxodii</i>, and provides residential management recommendations.

content.ces.ncsu.edu

You’re in prime time for this in your region. This bug causes brown out on BC