I have a painting of a vase with lupins (flower) signed Luisa 1963. Would like to know more about the painting and artist.

Yes, Lupins are lovely but unless you post a pick can't help with this. The artist is probably someone who painted several of them for a show sale (that was done a lot in the 60s). Someone hired a lot of artists to do many paintings and paid them by the hour, then they would hold a sale of 'starving artists'.