Hey everyone, I'm new here
I've been wanting to try out some rock planting for a while, and, being a bit of a scavenger whenever it comes to bonsai material, I went sifting through dad's rock collection in the garage (he used to go on business trips to mines around the world, and I guess the rocks were a lot more interesting than the staff meetings). That's when I stumbled upon a medium sized (about 5-6 inches long) chunk of coral. Bone-white, and riddled with holes like some mutant cross between pumice and swiss cheese.
Yes, yes, I know you're not allowed to take coral from coral reefs anymore, but hush, it was collected years ago
I've been soaking it in water for some months to get rid of any salt, but I guess since I'm planning on planting some collected saltbushes on it it shouldn't matter too much.
What I'd like to know is whether there would be any problems with using coral.
Would the calcium and whatnot in the coral leach into the soil? Could roots "eat" the coral?