As far as I can make out Kwekerij Jongerling is the name of a nursery in the Netherlands which sells citrus plants, so I suppose their lemons are just like any other.

yes it is a typical lemon plant. So follow any instructions for caring for lemon trees.

As Hywel says that is the nursery name. Think of it like David Austen roses. They are just roses at the end of the day.