What do I do w/plant after fish passes?

So my fish (betta) is still alive! I’m hoping to have him a long time, but I’m a novice to fish and plants. I’m just wondering IF the worst happens and my fish passes, what do I do with my live plants in my 5 gallon aquarium? I always thought I had to do a deep clean of the whole thing any time a fish passed, but I don’t want to dispose of the plants because they aren’t cheap! Thanks!