Climbing Roses in Pots

They would say that wouldn't they? Our acknowledged Rose expert is Wise Old Owl [Woo], who no doubt will be along asap to give you some great advice.
I have Rose "White Skyliner" climbing variety in a large wood barrel by my South facing Kitchen Door and it does really well because I feed it with Tomato Feed weekly [not weakly]. I bought it from a nearby Commercial Rose Grower/Breeder and he gave me some advice on how to keep a rose in a container up to standard. One of his tips was firstly don't just go for any old rose but do some research on what roses will not struggle in the limited space of a container. So, in other words, some roses will take to being in a container [if looked after] and some won't.

I use Tomato Feed and Miracle Grow but liquid Seaweed feed is fine.

 

Good morning @lucimyusmaximus my friend , the larger and deepest container you can get

Terracotta is made from clay – which is just a kind of soil – that is turned on a wheel and fired in a kiln. The hotter the firing, the more frost-resistant it will be. This is important because terracotta can crack and flake in very cold weather because the pots absorb water which then expands as it freezes and something has to give.Opt for a pot that provides good drainage. Plastic and clay pots with holes at the bottom offer better drainage ,and I always use John Innes No3 to plant my Rose
Place a one-inch layer of medium-sized bark chips or gravel over the bottom of the container. The chips or stones should be larger than any holes in the bottom of the pot to prevent them from falling through. This layer provides your roses with additional drainage.
Loosely pack the soil into the pot. Do not pack too tightly, as your rose needs room to breathe.
Increase the nutrient level by mixing a cup of bonemeal into the soil. Roses need a lot of nutrients, and bonemeal can provide the fertile conditions your roses need to produce many blooms.Place the rose into the soil. If working with a bare-root rose, spread the roots out comfortably. Rose roots need ample room to spread out horizontally.
Fill in the area around the rose with more soil. Gently press the soil around the stems. The surface of the soil should match the place where the roots and rose plant meet.The container should be filled so that the soil almost comes to the top. If the rose is too deep in the container, pull it out of the soil and add more to the bottom of the pot.Water until well saturated. Even though root rot does pose a threat to roses, these flowers also need plenty of moist soil to survive.Position the container in a location that receives full sun. Roses need at least 6 hours of sun daily to thrive.hope this helps my friend

Good root pruning and the correct compost. The so-called container-grown roses usually supplied by the nurseries have simply had their taproot bent into a pot that has been back-filled with a peat-based compost. The plants will not last long in these conditions.

Most roses are grafted on to deep-rooting rootstocks, which establish quickly and provide vigour and stability. The majority are grafted on to Rosa canina - a tried and tested method of growing them in the ground, but directly contradictory to growing the roses in containers.

Carefully prune the roots to compensate for their being confined, and to encourage a strong, fibrous system. The fibrous roots take up the water and nutrients that produce a good crop of flower and healthy foliage.

Pruning a rose at the root is similar in principle to pruning above the ground. A network of strong growths should be shortened to encourage lateral branching. This is where the all-important fibrous roots are developed. They are essential because they replace the stabilising taproot and allow the plant to feed in a limited space. , continue this regime every other year to prevent the long taproots re-forming when plants are re-potted.

Proviso
Most varieties of roses (Rosa spp. and cultivars) make good container plants if you match the size of the rose to a container that accommodates its growth. Roses have deep, fibrous root systems that need a large pot to yield a healthy plant with abundant flowers. Climbing roses present a problem, because the plants get so large -- many cultivars growing over 12 feet tall with numerous branches -- that they have corresponding large, very deep root systems. Some rose growers advise against growing climbing roses in containers because they won't perform well. However, there are measures you can take to successfully grow climbing roses in containers.

 

Good morning @luciusmaximus you of course can grow Roses with your approach or indeed any plant come to that ,I'm not really sure what to say but when you consider that for a few pounds your rose looked after properly will give you 20/30 years of pleasure and pride,maybe I
initially gave you to much information my apologies for that but Roses do grow on you once you have planted your Rose all you have to do is prune it once a year usually Feb/March,remove the spent blooms(dead head) and just make sure its got enough water

 

The Commercial grower who I bought my Rose White Skyliner" from did recommend taking a third off the roots every 4 years.......but then he was talking about the roses that he put on show at Flower Shows.

 

I wouldn't put them in Dustbins, Luc, as the Binmen might be tempted. Containers with around 18 inch of depth will do the job nicely, My Whiteskyliner is doing nicely in a oak barrel portion of less than that and is quite happy.