The stem length of sweet potato varies according to different varieties. It can be divided into long vine type with a length of 2 to 3 meters, medium vine type with a length of 1 to 3 meters, and short vine type with a height of less than 1 meter. The color of the stem can be divided into green, brown, purple, etc..
The stem length of sweet potato is 0.7 to 7 meters, with a large span. The color of the stem is pure green, brown green, purple green and full purple. There are hairs on the surface.
The leaves of sweet potato have various shapes, such as heart, triangle or palm. Generally, the length and width are not more than 10 cm, but there are also very large ones. The length is 15 cm, the width is 17 cm, and the vein color is divided into light red, red, purple, light purple and green.
Sweet potato in addition to the former all heart, triangle or palm shape, there are kidney shape, vein color green, green purple, purple, etc.
