A question regarding clementis.

in Plants
I have 4 clementis plants each in a pot beside my fence in garden that has a trellis along the top (see photos) im curious if the setup i have here is going to work for them growing up and around the trellis (this is my end goal) the clementis in the pots do have a single bamboo cane which i have positioned so it is leaning in towards the fence at the bottom of the trellis. But is this enough or do i need to do more. This photo i have shared shows bamboo along the fence but please ignore this the trellis runs the whole way along behind the bamboo and is
no longer there.

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That rush screening won't last 5 minutes with the weight of climbers on it, especially once it gets wet and blasted by winds so I would suggest you replace it with discreet wire stretched on tensioners between the fence posts.
Good colour fence and great background for clematis if you get any but they will need even bigger pots than the ceanothus if you want them to do well and will need regular feeding and watering.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
Pruning will depend on which clematis you have.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
Once it gets going it goes.
Mine is a Montana Elizabeth. Further along that there is a Rambling Rector. )
Anything is better than Leylandii
'You must have some bread with it me duck!'
When you don't even know who's in the team
S.Yorkshire/Derbyshire border
People have already advised about bigger pots, though yours are very nice Jordan.
I try to pick something with a good wide base, cube shapes can be good if you have tall plants and the pot is not fixed in some way. or a short fat cylindrical shape rather than tall narrow upside down bell or cone, they are rather unstable if you get windy weather.
Below are my two ceanothus after a couple of years growth and as you can see they get quite large and require a strong support.