I've seen in many videos that wisteria needs well pruning. However, I am far from this stage as my seedlings have just started to sprout. Last month I fed it with burnt organic ash mixed with burnt organic manure. Since there is no additional information, it means that I will continue to water once every evening. I don't know if it's true, but I haven't received any information to the contrary.
Thanks both of you for the information you provided.