Acorus calamus: how long it grows in swamps, paddy fields and streams, it is cold-resistant, and underground stems can dive into the soil for winter.

Umbrella: I like warm and humid environment, and don't plant it too closely.

Arundo donax: It likes wet water and has developed rhizome, which is widely distributed in Hainan, Guizhou, Sichuan and other places.

Water onion: how long it grows at the water's edge, lakeside, swamp, shallow pond and other places, and it can survive the winter smoothly in the northern region.

Ranunculus japonicus: perennial aquatic herb, which can prevent water from being polluted.

First, Acorus calamus

Acorus calamus is a perennial herb, which grows mostly in swamps, paddy fields and streams, and is suitable for 20~25℃. In winter, underground stems can dive into the mud for winter, which is not drought-tolerant and cold-resistant, and is widely distributed in the north and south of China.

Second, the umbrella

Umbrella originated in the West Indies, and it is widely cultivated in the southern part of China. It likes warm, humid and airy environment, and it should be cultivated properly, not too tightly, otherwise it will affect its ventilation and light transmittance, and it looks messy.

Third, Arundo donax

Arundo donax is a perennial plant of Gramineae and Arundo donax. It likes warm climate and wet water and is widely distributed, mainly in Hainan, Guizhou, Sichuan, Jiangxi, Zhejiang and other places. It has a well-developed rhizome, the stem grows thick and erect, often branches, the leaf sheath grows in the internodes, and the leaves are flat and 30-50cm long.

Fourth, water onion

Allium fistulosum is a Cyperaceae _ grass plant, which mostly grows in water, lakeside, swamp, shallow pond and wetland grass, and is distributed in Shanxi, Gansu, Jiangsu, Sichuan, Guizhou and other places in China. The suitable temperature for its growth is 15~30℃, and it has a certain low temperature tolerance, and it can successfully overwinter in the open field in most areas of northern China.

V. Ranunculus japonicus

Ranunculus ternatus is a perennial aquatic herb, which mostly grows in valleys, streams, ponds, plain lakes, and waterlogged places on river beaches, mainly distributed in Hebei, Liaoning, Jiangsu, Jiangxi, Shanxi and other places. Its main value is to prevent water pollution. Its stem is 30cm long, hairless, and its nodes are sparsely hairy. Its leaves have short or long handles, which are nearly semicircular and fan-shaped.