75 days. (Solanum burbankii) Sunberry also known as Wonderberry, produces small and tasty, purple fruit. Great for fresh eating as well as cooking. Easy to grow plants. This plant is a nightshade and, as with potatoes, it's chlorophyll is bound with poisonous alkaloids. Eat only fully ripened, dark purple berries, without any green on them. Don't eat green potatoes either!