Color to Light Frost Color to a Hard Frost Color Beyond Frost Asters (Annual)  Daisy, Marguerite Geraniums Marigolds Salvia c. ‘Lady in Red’ Sweet Potato Vines Purple Fountain Grass Asters (Perennial)  Calibrachoa Cyclamen Diascia Gazania Geranium, Regal Mums Nemesia Oenothera ‘Lemon Drop’ Osteospermum Petunia Phlox Intensia Rudbeckia Salvia, Greggii & Victoria-types Stocks Verbena Alyssum  Astilbe...