The Isle of Wight used to be part of Hampshire. About half the island (ie the west half) is designated as the Isle of Wight Area of Outstanding Natural Beauty. The outstanding garden is that of Osborne House. It is as good an example as you can find of the Victorian Mixed Style, rather Italianate but with a Swiss Cottage and other mixed features.
In addition to the Isle of Wight Garden Finder entries in the list, please see the Garden Tours pages for information on tours, self-guided visits tailor-made tours and gardens open to the public.