Greetings:
This may sound/feel counter-intuitive, but by all accounts works wonders. It really makes sense once you dig into it. I was considering doing a sea-water based hydroponic basil grow this year but didn't ever get around to it. I bought the piping for it yesterday so I should have a functioning system up by next Spring.
http://www.ratical.org/ratville/SEA.html
If you live inland you can buy the solids for your home/garden/orchard here...
http://www.seaagri.com/
This is a long term remineralizing system that will make your food stuffs healthier and more nutritious. It can be used on annuals as well as perennials. I can almost see the day when the MIC changes to the MGC (militaryindustrialcomplex to militarygiftingcomplex) and we do mass spraying of sea water over all the crop lands and forests!