Is it ok to plant climbing roses in a trough shaped planter
I want to know if a climbing rose we've just bought can be put into a trough shaped planter.
I want to plant a climbing rose in a trough planter. I have to use a planter because it will be on a patio. The rose will be climbing up a trellis on a fence so we cannot move it once it starts growing. It is important that we get the planter right from the beginning.
I want to use a trough planter rather than a tall one because of space constraints. I am thinking of a trough planter which is 60cms long, 28 cms wide, 26cms high.
I think this is ok because the volume of soil is the same - it just fits into a better shape. I know that some plant roots need to go down, usually to access water. However, is it ok for climbing rose roots to grow outwards rather than downwards and if so, is a length of 60cms long enough?