There are many beautiful plants that will thrive and give you enjoyment for many years. Sun Perennials for Zone 8 Explore our brand new lineup of sun perennials for zone 8 for the hardiest and top performing flowering plants for every sun-kissed spot in your garden. Be prepared to be wowed by the excellent variety in flower color, form and height. Various flowers thrive in Zone 8 during the winter months. Learn more here. This means that on a really cold year, the coldest it will get is 15°F.On most years you should be prepared to experience lows near 20°F.. Below is a list of planting guides for Zone 8b. Zone 8 is one of 13 hardiness zones in the United States. Like all zones, it is divided into two subsets.These are Zones 8a and 8b. The zone designation can help you select plants suitable for your zone's cold temperatures. Mature camellias reach up to 10 feet in height and 8 feet in width. Camellia. Zone 8 plants for full sun include trees, shrubs, annuals, and perennials. The camellia (Camellia reticulate), a broadleaf evergreen in the Theaceae plant family, does well in USDA Zones 8 to 10 when planted in partly shady positions with acidic, moist soils. If you live in zone 8 and have a sunny yard, you have hit the gardening jackpot.