1, the weight of a purple potato depends on its size and variety, so it is impossible to determine how many grams a purple potato has.

2. Purple sweet potato, also called black sweet potato, is purple to deep purple. Besides the nutrients of common sweet potato, it is also rich in selenium and anthocyanins. Purple sweet potato likes warm climate, and the suitable growth temperature of stem and leaf is 18~25℃, and it stops growing when it is lower than 15℃.