The cooking time of boiled sweet potato varies with the size of sweet potato. Generally, sweet potatoes are cut into pieces with uniform size of 1 cm, and then boiled for 10 minutes. But if the whole sweet potato is cooked, it will take 15-20 minutes for the palm-sized sweet potato to be cooked after the fire is boiled.

To judge whether the sweet potato is ripe, you can poke it from the surface with chopsticks. If the sweet potato can be successfully poked, it means that the sweet potato is ripe.

Growth habit

Sweet potato likes light and is a short-day crop. Plant growth needs high light energy, which is a crop that is not tolerant to shade. From the stem and leaf stage, the growth period of light energy is long and the photosynthetic efficiency is high. Otherwise, it will reduce photosynthetic efficiency and affect plant growth.

The daily sunshine duration should be 8- 10 hour. Adequate sunshine can not only promote flowering and rooting, but also make more nutrients accumulate on the roots and promote the expansion of the roots.