You asked
Is the canon ef 35mm f 1 4l ii usm good for landscape?
Yes, it can work for landscapes, with a couple of caveats. On full frame it frames as a standard-wide 35mm, which suits scenes with foreground and context. On APS-C it becomes roughly a 56mm equivalent, which is too tight for most landscapes, so I'd pair it with a full frame body.
Landscape is a slow, tripod-friendly kind of shooting, so the f/1.4 speed matters less than it would for evenings or people. Stopping down will do more for you. The lens isn't stabilised, so a tripod helps. Good full frame bodies to pair it with include:
For the full picture on what matters in a landscape camera, see Landscape.
Written by Claude from this site's pages.