Originally Posted by Tom115
Is the weed farm part of the story?
Not that I know of, just something you can stumble on.
I found it after doing one of the missions that start at the airfield you can buy as Trevor, one of the buggy missions had me pick up a package there and I went afterwards.
There's also a mission in the online portion called Potshot that you can do there, but that's all that I'm aware of as far as it being a part of the story.