Welcome to our forum, Crooks!
You'll find that we're a bunch of friendly people who are eager to help each other with gardening problems (& some of us are looking for help with ours, too!)
We're like one big family here, & look forward to getting to know you better!
I posted this answer to your question, over in the plants
I'm not 100% sure if there is enough salt left on rocks & things gathered from ocean beaches to bother plants
, but I think that rinsing them off wouldn't be a bad idea.
Years ago, I hauled a lot of kelp home from the bays in Seattle Washington & buried it in my garden, & my vegetables grew like crazy! I've also crushed up clam shells & put that in my gardens, & have decorated garden beds with driftwood found on ocean beaches... (there was plenty of salt content in that stuff, & at the time I hadn't even thought about it having a bad effect of the plants... or I probably wouldn't have done it!)
So what will you be growing
in your garden?
By the way, we LOVE pictures here... I hope that you'll take pictures & share them with us, when you get your garden all fixed up with the beach stone!
I hope to see you again soon... & often!