About assets

I purchased a conifer forest asset months ago, and download it to my UE4 project, a very epic purchase, i did notice blue prints in the package, which already do have a complete and complex node set up, reminding me of a national railway set up, i would like to know if all the marketplace environmental asset packages have already blueprinting do, do i still have to do one, or i don’t, if i don’t have to come up with one, will the asset package do it as i dress a landscape up, with those conifer forest trees etc?