2 of my plants look done 5 weeks into flowering.....

Hi can someone explain to me why 2 of my plants out of the group look ready to cut down and there only 5 weeks into flowering. Can anyone explain to me why this is because they have had the same treatment as the others.

They most likely arent. Without pics you cant get much help here, other than to say you should be checking the trichomes with a scope to really see whats going on and yes, 5 weeks is very much on the early side. You give almost no information here such as, what kind of strain are they ? What kind of lighting ?...the medium ? etc...

Do you have different strains? Some mature faster then others. (What strain(s) do you have?)
If you don't, you may have 2 different phenotypes of the same strain (generally they will "look" different too). One may mature faster then the other. This is common.

Pictures speak a thousand words!

Could the early ones be males??