2 day new fence post cracked

[JustAstateOfmind]

Is this to be expected? Will rot get in?

Thank you.

It’s fine, they are pressure treated.

@OneForTheToad what does pressure treated mean? I'm sorry I haven't got a clue about wood. I paid so much money, i didn't notice this crack when it was first finished. Then it poured down with rain, dried and I noticed this. It is a main post and the crack is quite long, I am worried it could get worse? Is this normal after only acouple of days. The rest looks fine, it is just this one post