Idk how to really ask this question but I haven't found the answer anyways. But let's say you get a strain that in the genetics it should be a purple strain, when would that show if it even did? I know just because something is a purple strain doesn't mean it's going to happen. You can have 100 plants of the same genetic that all look different still lol. Is it typically the last two weeks of flower?

It all depends. Sometimes it shows purple mid flowering and sometimes it comes out at the end.
Ooo blueberry muffins sounds delicious!