If you absolutely want to neuter him but you feel you can wait, then I would wait until he is 2 years old, that way he is physically mature before you do it, if you do it.
I neutered my GSD at 15 months because it was Dog Park rules. We never had temperment issues, marking, roaming or anything. He is 1.5 years old now.
My GSD/Husky mix is 1.5 years old and he is not neutered, again no temperment issues, marking, roaming or anything. I dont know if I am going to get him neutered, if I do I wouldn't do it until he was at least 2 years old.
I neutered my GSD at 15 months because it was Dog Park rules. We never had temperment issues, marking, roaming or anything. He is 1.5 years old now.
My GSD/Husky mix is 1.5 years old and he is not neutered, again no temperment issues, marking, roaming or anything. I dont know if I am going to get him neutered, if I do I wouldn't do it until he was at least 2 years old.