Purple spot on tops

hello,

this is jack herer growing outside and it just start blooming but for 2 or 3 week it startng to appear some purple spot just on the top. take a look at the picture...any idead anyone???

Hello, i don't know about purple spots but I have same problems on leaves as you do. Little holes only on those top leaves. If you find what is it please post here. Also please check my picture
Do your top leaves look like this?