Last year I was in Giverny in October and it was great - rather few people (at least in the Giverny dimensions) and the garden was still wonderful with many flowers (the part near the house) and even butterflies... The lower part with the famous bridge was great too although there is of course no blooms left over the bridge in October (I don't know the English name for the plant, in German we call it Glyzinie).

Baerbel.