You can purchase rock salt at most supermarkets and hardware stores. I've seen it for �0.85 for 250g, which works out at �3.40 a kg.
You can also purchase rock salt combined with herbs, priced at �1.30 for 290g.
Rock salt can be purchased either at the store or online.
You can also purchase rock salt combined with herbs, priced at �1.30 for 290g.
Rock salt can be purchased either at the store or online.