My planter

I have 4 very large 100cm long planters/troughs which are going to be positioned against a wall which is also sheltered.
I love ornamental grasses and wondered whether a combination of evergreen grasses and another element of colour could be mixed together and would work well in the space and troughs? I would love some advice as I don’t want to get this wrong but am a novice so any advice would be appreciated.
I live close to the coast but not within 1 mile and we have a breezy garden. Hope you can help.
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Final question, which way does the wall face ?
Also if you could post a photo of them, that might help.
thanks for any advice you can give would need to remain a metre or so, tall. thanks
https://www.knollgardens.co.uk/shop/?type=grasses&area=pots-and-containers