No flowers on lemon tree

Tropicdude says...
Was this tree planted by seed? how old is it? lemon trees planted by seed take many years before they fruit.

Also, if this lemon tree was a graft, it could be that root stock took over, so even if you purchased a graft it could be that what your looking at is the root stock.

I also read that lots of water can give you lots of growth but little or no fruiting.