Why are my cedar trees turning orange (dead) at the tips?

Fallcast or flagging.

Could be low iron. I had similar issue with my evergreens. When a master gardener tested the soil, he found the iron level to be too low to properly feed my trees. Check your local co-op to see if they have someone to check your soil. Once you find your soil composition and inform them of your plant types, they can suggest proper fertilizer your specific needs.

are your trees flat at the top? or pointed? cedars, pines- once they get to full maturity the top flattens out how much longer it will last is anyone's guess.. how much water are the trees getting?

Are you having an especially dry season? They may need water. Ask at your local nurseries, sometimes in your area they can give some insight.

https://www.ehow.com/info_8331006_causes-cedar-turn-orange.html

Call your local arborist, they will usually check it out for a small cost or even for free. If you don’t have one that’s local, test your soil to see if your tree is getting the right nutrients. Good luck!! 😃

My cedar trees do this also, but on a cycle. Every spring they put on these nodules that are their pollenation, similar to the pollenation of pine trees.