I used to assume that if a seller didn't mention invasive plants, the land was reasonably clean. That assumption cost me hundreds of volunteer hours and a strained relationship with neighboring landowners after we took on a creek-bottom parcel for the land trust.
Sellers either don't recognize autumn olive, bush honeysuckle, and Japanese knotweed, or they genuinely don't think it's their problem to disclose. By the time we did our post-closing walkthrough in late summer, those bottomlands were wall-to-wall honeysuckle in the draws and knotweed choking every gravel bar. None of it showed clearly in the spring listing photos.
Now I tell anyone buying rural land in the Ozarks or anywhere in the eastern hardwood belt: hire someone who actually knows invasives to do a dedicated vegetation survey before closing, in full leaf, not in February. A general home inspection will not catch this. A casual walk won't either.
Has anyone else found regional invasive pressure that completely blindsided them after purchase, or do sellers in your area actually disclose this stuff honestly?