By Spottedray
wales,
United Kingdom 
Growing potatoes in seaweed
Anyone tried this method-hope link works. I've added seaweed to the soil for quite a while but never realised that spuds could be grown in a pot directly in seaweed with no compost. I live in a seaside town (Porthcawl, south wales, so getting weed (both types, lol) is not a problem!
http://homeguides.sfgate.com/grow-potatoes-seaweed-26227.html
2 Jun, 2013
Previous question
In times gone bye, the crofters used to grow potatoes on very poor soil nurished by copious amounts of seaweed. I have never used seaweed as it would mean a drive of, say, 20 miles to a location where it is heavily deposited at the side of, and across, the road!
Give it a try next year, Sr, and report back on your findings.
2 Jun, 2013