按要求经常给每一株植物浇水。用英语怎么说？

按要求经常给每一株植物浇水。

Water each plant as often as required.

water

n. 水，雨水，海水，海域；v. 给…浇水，供以水，加水稀释，流泪；

例句
...a licence to abstract water from the River Axe...
从阿克斯河中抽水的许可证

each

adj. 每，各自的；pron. 每个，各自；

例句
They were completely absorbed in each other...
两人彼此倾心。

plant

n. 植物，草木，设备，工厂，庄

例句
...a plant that grows abundantly in the United States...
在美国大量生长的一种植物

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

often

adv. 常常，经常，时常，再三；

例句
Genetic abnormalities are more often associated with faults in paternal DNA than in maternal DNA.
相对于母本DNA,基因畸变往往更多地与父本DNA上的缺陷相关。

required

adj. 必须的，<美>（学科）必修的；v. 要求( require的过去式和过去分词 )，需要，想要，命令；

例句
Further scans are required to confirm the diagnosis of an abnormality...
需要进一步扫描来确诊是否出现异常病变。