Oysterplant - Sea Bluebells

That would look lovely. I’m not sure if they could all go in a bed together. Chiltern seeds. Says oyster plant is very prone to slug attack. So I took the massive leap that you don’t use saltwater? Which confuses me a little. Even though the rest of the coastal plants may not grow as close to the saltwater as samphire. I’d thought they’d still take in a small amount?
I can picture a much smaller version of the cottage garden with little individual beds of the coastal plants with shell path between.
I need to give this som thought.