What kinds of plants, Guest?

Salt water and plants don't go well together and presumably the salt is also in the soil. If they are annuals or biennials I would bin (not compost them). If they are perennials or shrubs water really well and spray wash the leaves. The salt in the ground is going to be the biggest problem.

We deal with salt in the soil all the time here, but I can't say it's easy. Try applying sulfuric acid or humic acid. If you're not gardening in a coral-based soil. you might also be able to use gypsum. Follow up the application with a very deep irrigation--the equivalent of 20-25 cm of water on the soil surface, maybe 2-6 hours of watering, depending on drainage. You might have to repeat monthly for a while. Good luck!