I make my own bath salts, so I have lots of epsom salt and Dead Sea Salt for that. I've been reading about the beneficial use of epsom salt with roses and started wondering about the other. Has anyone ever heard of any benefit to adding Dead Sea salt to potting mix for mini-roses in pots?
The sodium in Dead Sea salt is bad enough but the chloride content will kill your roses. Roses are sufficiently sensitive to chloride that in some cities the chloride added by water softeners will turn the leaf tips brown when tap water is sprayed on the foliage. I would not use any fertilizer, organic or otherwise, with a chloride content of 1% or above. Dead Sea Salt is probably close to 50% chloride.
