There's no restriction what so ever in using an 85mm for landscapes. It's not about the kit at all - It's about the photograph you want to achieve. Don't get sucked into this odd 'general' opinion that for landscapes the wider the lens the better. In a lot of cases, wide and ultrawide lenses give a very unusual perspective which in some cases ruins the photograph. Also, wide angle lenses tend to get over used when, in reality, they are not necessary for the scene; the approach of get as much in the photograph as possible is used instead of a careful consideration of the composition.
Please don't read my post as "all wide angle lenses are bad for landscapes". They are not. They have their place just like a standard and longer length lens. As said, it's about the photograph you want to achieve and it should be this approach that guides what kit you should use.