Home Poisonous Plants Bittersweet Nightshade Call 800-222-1222 Home Poisonous Plants Bittersweet Nightshade Call 800-222-1222 Bittersweet Nightshade (Solanum Dulcamara) Native Vine-like plant that may grow as high as 6 feet. Commonly mistaken for Deadly Nightshade. Toxicity Poisonous Berries/Fruits Berries are green and in late summer turn red when ripe Flowers Violet or blue flowers with yellow stamens. Plant flowers May to October. (Click images to enlarge.) POISONOUS PLANT DATABASE Search By Keyword View All Plants Plant Poisoning Prevention Brochure (PDF)