Mid-Kent Water has been accused of giving misleading information to gardeners.
The company, which has applied for a drought order to curb the use of water, has displayed posters giving six ways to use water wisely.
But its advice to gardeners has annoyed garden centre and nurseryman Richard Phillips of Sandhurst in Kent.
He said: “One of the tips reads: ‘Water little and often in early morning or late evening. Water less frequently but more thoroughly to encourage plants to extend their roots deeper into the soil.’
“Anyone with any basic gardening knowledge is fully aware one never waters little and often. This encourages soil panning.
“The resulting hard crust makes subsequent watering ineffective because water runs off instead of penetrating the soil.”
A representative of Mid-Kent Water said: “We are sorry if people are confused about this but we obtained our information from the RHS website.
An RHS representative said: “We are looking at whether they have misinterpreted something we have said or sent to them.”
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